PLEASE HELP! The image is below:

PLEASE HELP! The Image Is Below:

Answers

Answer 1

The values of the equation are x=2.71 or x=1.29

The given quadratic equation is 2x²-8x+7=0

We solve by using the formula x = -b±√b²-4ac/2a

From the equation, a =2, b=-8 and c=7

x=8±√64-4(2)(7)/2(2)

x=8±√64-56/4

x=8±√64-56/4

x=8±√8/4

x=8+√8/4  or x=8-√8/4

x=2.70 or x=1.29

Hence, the values of the equation are x=2.71 or x=1.29

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Related Questions

Consider a system with three parallel servers. Job arrivals are Poisson distributed at the rate of eight per hour unless all three servers are busy. Since there is no waiting space, the arrival rate is zero if all servers a busy. Normally, each server has service time that is exponentially distributed with mean 20 minutes. However, if all three servers are busy the servers speed up so that mean service time is 15 minutes. Find the steady state probability for each system state

Answers

Steady-state probability for each system state π_1 = 3π_0 ≈ 0.495.

What is probability?

Probability is a measure of the likelihood of an event occurring.

To analyze the system, we can use the Markov chain approach. We can define the state of the system as the number of busy servers, ranging from 0 to 3. Let's denote the state of the system at time t as X(t). The transition rates between states depend on the arrival and service rates, as follows:

For X(t) = 0, the arrival rate is λ = 8 per hour, and the departure rate is μ = 1/20 per minute per server. Therefore, the transition rate from state 0 to state 1 is λ, and the transition rate from state 1 to state 0 is 3μ.

For X(t) = 1, the arrival rate is λ = 8 per hour, and the departure rate is μ = 1/20 per minute per server. Therefore, the transition rate from state 1 to state 2 is λ, and the transition rates from state 2 to state 1 and from state 1 to state 0 are both 2μ.

For X(t) = 2, the arrival rate is λ = 8 per hour, and the departure rate is μ = 1/20 per minute per server. Therefore, the transition rate from state 2 to state 3 is λ, and the transition rates from state 3 to state 2 and from state 2 to state 1 are both μ.

For X(t) = 3, the arrival rate is λ = 0 (since there is no waiting space), and the departure rate is μ = 1/15 per minute per server. Therefore, the transition rate from state 3 to state 2 is 3μ.

To find the steady-state probabilities for each system state, we can use the balance equations:

π_i * q_i,j = π_j * q_j,i

where π_i is the steady-state probability of being in state i, and q_i,j is the transition rate from state i to state j.

We can set up a system of four equations (one for each state) and solve for the unknown probabilities. The equations are:

λπ_0 = 3μπ_1

λπ_1 = 2μπ_2 + 2μπ_0

λπ_2 = μπ_3 + 2μπ_1

3μπ_3 = μπ_2

We also have the normalization condition:

π_0 + π_1 + π_2 + π_3 = 1

Solving the system of equations, we get:

π_0 = (1 - ρ) * (1 - ρ²) * (1 + 3ρ + 9ρ²) / (1 + 3ρ + 9ρ² + 9ρ³)

π_1 = 3π_0

π_2 = 3ρπ_0

π_3 = ρ³π_0

where ρ = λ/3μ is the traffic intensity.

Substituting the given values, we get:

ρ = (8/3) / (3 * (1/20)) = 32/3

π_0 = (1 - 32/3) * (1 - (32/3)^2) * (1 + 3*(32/3) + 9*(32/3)²) / (1 + 3*(32/3) + 9*(32/3)² + 9*(32/3)³) ≈ 0.165

π_1 = 3π_0 ≈ 0.495

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Alexa drew a square that has a perimeter of 20 inches.

How long is one side of her square?

Answers

since a square has 4 sides, divide 20 by 4 which is 5.

Answer:

5 in.

Step-by-step explanation:

For a square:

perimeter = 4 × side

20 in. = 4 × side

side = 20 in. / 4

side = 5 in.

PLEASE HELP ME, THIS HAS TO BE DONE BY TODAY!!!

You toss a coin (heads or tails), then spin a three-color spinner (red, yellow, or blue). Complete the tree diagram, and then use it to find a probability.

1. Label each column of rectangles with "Coin toss" or "Spinner."


2. Write the outcomes inside the rectangles. Use H for heads, T for tails, R for red, Y for yellow, and B for blue.


3. Write the sample space to the right of the tree diagram. For example, write "TY" next to the branch that represents "Toss a tails, spin yellow."


4. How many outcomes are in the event "Toss a tails, spin yellow"?


5. What is the probability of tossing tails and spinning yellow?

Answers

Answer and Explanation:

1. The left column should be labeled coin toss because we can see that there are two outcomes from a coin toss: heads or tails.

We know that the right column should be labeled spinner because it has three outcomes (red, yellow, or blue) for every previous outcome.

2. We can label the top box of the left column as H (for Heads) and the lower box as T (for Tails). Then, we can label the top, middle, and bottom boxes in the right column as R, Y, and B, respectively (for Red, Yellow, Blue).

3. Next to each box on the right, label the two events that lead to that outcome. For example, "HR" means that you tossed a heads, then spun a red.

4. There is only 1 outcome in the event "toss a tails, spin a yellow" because there is only one way (out of two ways) to toss a tails, and from there, there is only one way to spin a yellow (out of three ways).

5. The probability of tossing tails, then spinning a yellow is:

[tex]\dfrac{1}{2} \cdot \dfrac{1}{3} = \boxed{\dfrac{1}{6}}[/tex]

Find the B-matrix for the transformation X-_Ax when B= {b1, b2 , b3} ~ 7 -54 -18 A = 17 b1 -3 -54 22 b2 b3 The B-matrix is

Answers

The  B-matrix for the transformation X-_Ax is:

[17b1 - 3b2 - 54b3]
[22b1 + b2 + b3]

The B-matrix for the transformation X-_Ax is a matrix that represents the images of each basis vector in B under the linear transformation represented by the matrix A. To find the B-matrix, we first need to compute the product A*B, where A is the transformation matrix and B is the basis matrix.

In this case, we are given B = {b1, b2, b3} and A = [[17, -3, -54], [22, b2, b3]]. We multiply A by the column vector [b1, b2, b3] to get the image of each basis vector under the transformation. The resulting matrix has two columns, where each column represents the image of one of the basis vectors.

The B-matrix is then constructed by arranging the images of the basis vectors as columns of a matrix. So the B-matrix for the transformation X-_Ax is:

[17b1 - 3b2 - 54b3]
[22b1 + b2 + b3]

This matrix can be used to find the coordinates of any vector in terms of the basis B after it has been transformed by the linear transformation represented by A.

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on Monday a local hamburger shop sold a combined total of 472 hamburgers  and cheeseburgers. The number of cheeseburgers sold three times the number  of hamburgers sold. How many hamburgers were sold on Monday? 

Answers

On Monday the total number of sold hamburgers are 118.

Let's call the number of hamburgers sold "h" and the number of cheeseburgers sold "c".

From the problem, we know two things:

The total number of burgers sold is 472:

h + c = 472

The number of cheeseburgers sold is three times the number of hamburgers sold:

c = 3h

We can use substitution to solve for h:

h + 3h = 472

4h = 472

h = 118

Therefore, 118 hamburgers were sold on Monday.

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A survey asked 400 dog owners if they had more than one dog as a pet.
Forty-five percent responded that they owned more than one dog. How many
dog owners in this survey owned more than one dog?
A 180
B 200
C 160
D 45
400 45 4504000
95
100
180

Answers

Answer: There were 180 dog owners in this survey that owned more than one dog.

Step-by-step explanation:

Since this word problem is a percentage problem, you will need to convert 45% of 400 to a hundredths decimal.

45% -> 45/100 -> 0.45

Then, to find the solution, multiply 0.45 by the total number of dog owners in the survey. (400)

0.45

x400

---------

 180!

The answer you'll get will be 180, so therefore, 180 dog owners in this survey owned more than one dog. Hope this helps!:)

. jack has a piece of rope that is 7.5 meters long. he gives his sister a 150 cm piece. he cuts the remaining piece into 10 equal sections. how long is each section?

Answers

Jack has a 7.5 meter (750 cm) rope, gives his sister a 150 cm piece, and cuts the remaining 600 cm into 10 equal sections, with each section being 60 cm long.

Jack's rope is 7.5 meters long, which is equal to 750 centimetres. He gives his sister a piece of 150 centimetres, which leaves him with 600 centimetres of rope.
Jack then cuts the remaining piece into 10 equal sections. To find the length of each section, we can divide the total length of the rope (600 cm) by the number of sections (10):
600 cm ÷ 10 sections = 60 cm per section
Therefore, each section of rope that Jack cuts will be 60 centimetres long.

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if determining whether or not a measured effect can be distinguished from zero, we are interested in :a. practical significanceb. statistical significance

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When determining whether or not a measured effect can be distinguished from zero, we are interested in statistical significance.

Statistical significance refers to the likelihood that the results of a study are not due to chance. In other words, it assesses whether the effect observed in a sample is likely to be a true effect in the population, or whether it could have occurred by chance. Statistical significance is typically assessed using hypothesis testing and a significance level (usually set at 0.05), which represents the probability of obtaining the observed results or more extreme results under the assumption that the null hypothesis (i.e., no effect) is true. If the probability is less than the significance level, the result is said to be statistically significant, indicating that the null hypothesis can be rejected and the observed effect is likely a true effect. Practical significance, on the other hand, refers to the importance or relevance of the observed effect in the context of the research question or real-world application.

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what is the answer to this equation
-7=2x-7

Answers

Answer:

-7+7=2x

Step-by-step explanation:

0=2x

0/2=2x/2

0/2=x

based on this sample, is there enough evidence to say that the standard deviation of the resting heart rates for students in this class is different from 12 bpm? use α = 0.05 .

Answers

To answer this question, we would need to perform a hypothesis test using the given sample data and a significance level of α = 0.05. The null hypothesis would be that the standard deviation of the resting heart rates for students in this class is equal to 12 bpm, while the alternative hypothesis would be that it is different from 12 bpm.



We would then need to calculate the sample standard deviation from the given data and use it to compute the test statistic (either a t-score or a z-score, depending on the sample size and whether or not the population standard deviation is known). We would compare this test statistic to the critical value from the appropriate distribution (either a t-distribution or a standard normal distribution) using the given significance level.

If the test statistic falls outside the critical value region, we would reject the null hypothesis and conclude that there is enough evidence to say that the standard deviation of the resting heart rates for students in this class is different from 12 bpm. However, if the test statistic falls inside the critical value region, we would fail to reject the null hypothesis and conclude that there is not enough evidence to make such a claim.

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if f(x, y, z) = 4xy2z3 arcsin x z , find fxzy. [hint: which order of differentiation is easiest?]

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if f(x, y, z) = 4[tex]x[/tex][tex]y^{2}[/tex][tex]z^{3}[/tex] arcsin (xz) , the value of fₓzᵧ is "24xyz²√(1-x²z²)".

To find fₓzᵧ, we differentiate f(x,y,z) partially with respect to x, then z, and finally y.

First, we take the partial derivative of f with respect to x:

fₓ = 4y²z³(arcsin(xz)) + 4xy²z³(1-x²z²)⁻ᵐ

where m = 1/2 * (1 - x²z²)⁻ⁿ, n = -1/2

Next, we take the partial derivative of fₓ with respect to z:

fₓz = 12xyz²(arcsin(xz)) + 4y²z²(1-x²z²)⁻ᵐ + 8xy²z²x(1-x²z²)⁻ⁿ

Finally, we take the partial derivative of fₓz with respect to y:

fₓzᵧ = 24xyz²√(1-x²z²)

Therefore, fₓzᵧ = 24xyz²√(1-x²z²) is the solution, where x, y, and z are the values of the given function f.

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osses follow an exponential distribution with mean 1. two independent losses are observed. calculate the expected value of the smaller loss.

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The expected value of the smaller loss can be found using the properties of the exponential distribution.

Since the exponential distribution is memoryless, the probability of the first loss being the smaller loss is the same as the probability of the second loss being the smaller loss. Therefore, the expected value of the smaller loss is half of the expected value of the minimum of two exponential random variables.

The minimum of two independent exponential random variables with the same mean is known to follow an Erlang distribution with parameters k=2 and λ=1. Therefore, the expected value of the minimum of two exponential random variables with mean 1 is given by 2/λ = 2.

Thus, the expected value of the smaller loss is 1, which is half of the expected value of the minimum of two exponential random variables.

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If you look at many cities in the United States, there is a positive correlation between the number of Target stores in the city and the number of Walmart stores in the city. This means thatA. for every one Target store in a city, there is exactly one Walmart store.B. the employees who work at Target also work at Walmart.C. as the number of Walmart stores in a city increases by one, the number of Target stores also increases by exactly one.D. in order for a city to be productive, there must be at least one Target store and at least one Walmart store in that city.E. as the umber of Walmart stores goes up in a city, the number of Target stores

Answers

The correct option is C, as the statement suggests that there is a positive correlation between the number of Target stores and Walmart stores in a city.

This means that as the number of Walmart stores in a city increases, there is a corresponding increase in the number of Target stores in the same city. However, this does not necessarily mean that there is an exact one-to-one relationship between the two stores, as stated in option A.

Option B, which suggests that the employees who work at Target also work at Walmart, is incorrect as it is not supported by any evidence or data.Option D, which states that a city must have at least one Target store and one Walmart store to be productive, is also incorrect as it is a subjective statement and not a factual observation.Option E is not a complete statement and therefore cannot be considered as a valid answer to the question.In conclusion, the correct option is C, as there is a positive correlation between the number of Target stores and Walmart stores in a city, and an increase in the number of Walmart stores is associated with an increase in the number of Target stores.

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If we find that the null hypothesis, H_0 : B_j = 0, cannot be rejected when testing the contribution of an individual regressor variable to the model, we usually should: 1. remove the variable from the model. 2. do nothing. 3. add a quadratic term in x; to the model. 4. do none of the above.

Answers

If we find that the null hypothesis, H_0 : B_j = 0, cannot be rejected when testing the contribution of an individual regressor variable to the model, we usually should 1. remove the variable from the model.

This is because if the variable is not contributing significantly to the model, it is not useful in predicting the outcome. Therefore, removing the variable will simplify the model and potentially improve its accuracy.
Options 2 and 3 (doing nothing or adding a quadratic term in x) would not be appropriate if the variable is not significant, as they would not address the issue of the variable's lack of contribution.
Option 4 is also incorrect because we do need to take action if a variable is not contributing significantly to the model.

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let w be the subspace spanned by bold u 1 and bold u 2 . write y as the sum of a vector in w and a vector orthogonal to w.

Answers

To write y as the sum of a vector in w and a vector orthogonal to w, we first need to find a basis for w. Since w is spanned by bold u 1 and bold u 2, we can use these vectors as our basis for w:
B = {bold u 1, bold u 2}

Now, we can use the orthogonal complement of w, denoted by w⊥, to find a vector that is orthogonal to w. By definition, w⊥ is the set of all vectors that are orthogonal to every vector in w. We can find w⊥ by taking the null space of the matrix whose rows are the basis vectors of w:

A = [bold u 1; bold u 2]

w⊥ = null(A)

Once we have a basis for w⊥, we can find a vector that is orthogonal to w by taking a linear combination of the basis vectors of w⊥. Let's call this vector z:

z = c_1*bold v_1 + c_2*bold v_2 + ... + c_k*bold v_k

where c_1, c_2, ..., c_k are constants, and bold v_1, bold v_2, ..., bold v_k are the basis vectors of w⊥.

Finally, we can express y as the sum of a vector in w and a vector orthogonal to w:

y = a*bold u 1 + b*bold u 2 + z

where a and b are constants that we can find by projecting y onto the basis vectors of w:

a = (y · bold u 1) / (bold u 1 · bold u 1)
b = (y · bold u 2) / (bold u 2 · bold u 2)

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What’s the scale factor from ABC to DEF

Answers

The answer is D) 2/5 because you divide the new figure by the old figure which gives you 0.4 which as a fraction is 2/5

find the slope. 20, 425 and 5, 225

Answers

To find the answer look at the picture I have written in pencil handwriting

May l get Brainliest please

Ana opened a bank account with $ 1000 that earns interest, compounded continuously, at an annual rate of r=0.02 . Money can be withdrawn from the account at regular intervals, and no additions to the account can be made. The function P models the balance of the account, in dollars, at time £.

Answers

After 3 years, Ana's account balance would be approximately $1221.96, assuming a constant withdrawal rate of $200 per year.

Ana opened a bank account with an initial balance of $1000 and an annual interest rate of 0.02, compounded continuously. The function P(t) models the balance of the account in dollars at time t.
The function P models the balance of Ana's account, given the information provided.

1. Ana opens a bank account with $1000. This is the initial amount in the account.
2. The account earns interest compounded continuously at an annual rate of r = 0.02.
3. Money can be withdrawn, but no additions can be made.

Since money can be withdrawn from the account at regular intervals and no additions can be made, we can assume that the withdrawals are made at a constant rate. Let's call this rate "w" (in dollars per year). Therefore, the function P(t) can be modeled as:
The function P models the balance of the account, in dollars, at time t. Since the interest is compounded continuously, we will use the continuous compound interest formula:
P(t) = P₀ * e^(rt)

Where:
- P(t) is the balance at time t
- P₀ is the initial balance ($1000)
- e is the base of the natural logarithm (approximately 2.71828)
- r is the annual interest rate (0.02)
- t is the time in years

We get: P(t) = 1000*e^(0.02t) - wt

where e is the mathematical constant, approximately equal to 2.71828. The first term represents the balance of the account with continuous compounding, while the second term represents the withdrawals made from the account over time.

To calculate the balance of the account at a specific time t, we can substitute that value into the function P(t). For example, if we want to find the balance of the account after 3 years and assume that the withdrawal rate is $200 per year, we can write:

P(3) = 1000*e^(0.02*3) - 200*3
P(3) = 1000*e^(0.06) - 600
P(3) ≈ $1221.96
This function P(t) represents the balance of Ana's account, in dollars, at any given time t in years, considering continuous compounding and the possibility of withdrawals.

Therefore, after 3 years, Ana's account balance would be approximately $1221.96, assuming a constant withdrawal rate of $200 per year.

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frac x2-16x3+64 Which expression is equivalent to the given expression, if the denominator does not equal 0? A. 1/x-4 B. 1/x+4 C. frac x+4x2-4x+16

Answers

The correct answer is option B, which is 1/(x+4). To see why, first factor the denominator of the given expression:

x^2 - 16x + 64 = (x - 8)(x - 8) = (x - 8)^2

Now, we can rewrite the original expression as:

(x - 8)^2 / [(x - 8)(x + 4)]

Canceling the common factor (x - 8), we get:

(x - 8) / (x + 4)

This is equivalent to 1/(x+4) since (x - 8) / (x + 4) = (x + 4 - 12) / (x + 4) = 1 - 12 / (x + 4) = 1 - 3 / (x + 4/3). As x approaches infinity, 3/(x+4/3) approaches 0, so 1 - 3 / (x + 4/3) approaches 1. Thus, the expression is equivalent to 1/(x+4) for any value of x except x = -4.

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Neena went riding in the hills. At one point, however, her horse, dakota, stumbled and was hurt. Neena left dakota and walked back home to call her vet. Neena figures dakota walks about twice as fast as she does. If dakota was hurt about 8 miles into her ride and her whole trip took 4 hours total, how fast did neena walk?

Answers

If dakota was hurt about 8 miles into her ride and her whole trip took 4 hours total, Neena's walking speed is 2 miles per hour.

Let's assume that Neena's walking speed is "x" miles per hour. As per the problem, Dakota walks at twice the speed of Neena, which means Dakota's speed is "2x" miles per hour.

Now, we know that the total distance traveled by Neena and Dakota is 8 miles, and their total travel time is 4 hours. We can set up the following equation using the distance formula:

distance = speed x time

For Neena:

distance = x * t₁

For Dakota:

distance = 2x * t₂

Total distance = 8 miles

Total time = t₁ + t₂ = 4 hours

Substituting the distance and time values, we get:

x * t₁ + 2x * t₂ = 8

t₁ + t₂ = 4

Solving for t₁, we get:

t₁ = 4 - t₂

Substituting this in the first equation and simplifying, we get:

x * (4 - t₂) + 2x * t₂ = 8

4x = 8

x = 2

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A researcher randomly selects and interviews fifty male and fifty female teachers.
a. systematic
b. convenience
c. random
d. stratified
e. cluster

Answers

The sampling method described in the scenario is d. stratified sampling.

In stratified sampling, the population is divided into distinct subgroups or strata based on certain characteristics or variables. The researcher then randomly selects samples from each stratum in proportion to their representation in the population. This approach ensures that the sample is representative of the population's diversity.

In this case, the researcher has divided the population of teachers into two strata: male teachers and female teachers. By randomly selecting 50 male teachers and 50 female teachers, the researcher is ensuring that both genders are represented in the sample.

The researcher's intention is to have a sample that reflects the gender distribution of teachers in the population accurately. Therefore, stratified sampling is the appropriate method in this scenario.

Other sampling methods, such as systematic sampling, convenience sampling, random sampling, and cluster sampling, are not applicable because they do not specifically address the need to ensure proportional representation of genders in the sample.

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Find surface area, rounding to the nearest tenth if necessary 3.5m 6.9m

Answers

Answer:

A = 24.15cm2 ~ 24.2cm2

Step-by-step explanation:

Area is calculated by

[tex]a = l \times w[/tex]

a = area

l = length = 6.9cm

w = width = 3.5cm

A= 3.5cm × 6.9cm

A = 24.15 cm2

so the area is 24.15cm2 ~ 24.2cm2

4. A group of friends wanted to raise $200 to throw an end-of-the-year party. Five friends
decided they could not attend, so each person now had to pay $2.00 more. How many
friends originally planned the party?

Answers

The original number of friends planning the party was 25.

Let's assume the total number of friends originally planning the party is 'x'.

Initially, each friend would contribute an equal amount to raise $200. So the initial contribution per friend would be $200/x.

When five friends decided not to attend, the number of friends remaining is (x - 5). Now, each friend has to contribute $2.00 more than before.

So, the new contribution per friend is $200/(x - 5) + $2.

According to the given information, the new contribution is $2.00 more than the initial contribution:

$200/(x - 5) + $2 = $200/x

To solve this equation, we can eliminate the dollar signs and simplify:

200/(x - 5) + 2 = 200/x

Multiplying both sides of the equation by x(x - 5) to eliminate the denominators:

200x + 2x(x - 5) = 200(x - 5)

200x + 2x^2 - 10x = 200x - 1000

Rearranging the equation and simplifying:

2x^2 - 10x - 1000 = 0

Dividing the equation by 2:

x^2 - 5x - 500 = 0

Using the quadratic formula, we can find the values of x:

x = (-b ± √(b^2 - 4ac)) / (2a)

For our equation, a = 1, b = -5, and c = -500.

x = (-(-5) ± √((-5)^2 - 4(1)(-500))) / (2(1))

x = (5 ± √(25 + 2000)) / 2

x = (5 ± √2025) / 2

x = (5 ± 45) / 2

Simplifying further:

x1 = (5 + 45) / 2 = 50 / 2 = 25

x2 = (5 - 45) / 2 = -40 / 2 = -20

Since the number of friends cannot be negative, we discard x2 = -20 as an extraneous solution.

Therefore, the original number of friends planning the party was 25.

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Solve -4 a + 5 ≤ -7. i kinda need help

Answers

Answer:

a≥3

Step-by-step explanation:

Let R be the set of real numbers, C = (0, 10], D = (9, 15], E = {1, 2, 3} and F = (7, 10). Find: (i) (CUD-E) specified using set builder notation without any words. (ii) (CE) specified using interval notation and set operations concisely without any words. (iii) (CDF) specified using the most concise notation. (3 marks) (b) Use element argument method to prove that if A and B are sets such that P(A) ≤ P(B), then A ≤ B, where P(A) and P(B) are power sets of A and B respectively. You must state your reasons clearly for every statement in your proof.

Answers

(i) (CUD-E) specified using set builder notation:

(CUD-E) = {x ∈ R | (x > 0 ∧ x ≤ 10) ∨ (x > 9 ∧ x ≤ 15) ∧ x ∉ {1, 2, 3}}

(ii) (CE) specified using interval notation and set operations concisely:

(CE) = (0, 10] ∩ {1, 2, 3} = {1, 2, 3}

(iii) (CDF) specified using the most concise notation:

(CDF) = (C ∩ D) ∩ F

(b) Proof using the element argument method:

Given: A and B are sets such that P(A) ≤ P(B).

To prove: A ≤ B.

Proof:

1. Let x be an arbitrary element in A.

2. Since x is in A, by definition, x is a subset of A. Hence, x ⊆ A.

3. Since x ⊆ A and A ≤ B, by the definition of ≤, x ⊆ B.

4. Therefore, x is a subset of B. Hence, x ∈ P(B), where P(B) is the power set of B.

5. Since x ∈ P(B), by definition, x is a subset of B. Hence, x ⊆ B.

6. Since x is an arbitrary element in A and x ⊆ B, by definition, A ≤ B.

7. Therefore, if P(A) ≤ P(B), then A ≤ B.

In this proof, we used the fact that if x is an element of A, then x is a subset of A. Also, if x is a subset of A and A ≤ B, then x is a subset of B. These properties are based on the definitions of subsets and the order relation between sets.

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Sweets are sold in small packs and in big packs.
There is a total of 175 sweets in 4 small packs and 3 big packs.
There is a total of 154 sweets in 5 small packs and 2 big packs.
Work out the number of sweets in each small pack and in each big pack.

Answers

Answer:

Step-by-step explanation:

Let x - be the number of sweets in small packs

y - be the number of sweets in big packs

Therefore, we have:

4x + 3y = 175 (1)

5x + 2y = 154 (2)

Now, we find the difference between (1) & (2) is:

y-x = 21. Thus, y = 21+x

Now we substitute the value of y = 21+x to any of the two statements, we have 4x + 3(21+x) = 175 => 4x + 63 + 3x = 175.

Hence, 7x = 175 - 63 = 112 or simply, x=16.

Now, finding the value of y:

5(16) + 2y = 154

80 + 2y = 154

2y = 154-80

2y = 74

y = 37.

Therefore, there are 16 sweets in each small pack and 37 sweets in each big pack.

If T : P1P1 is a linear transformation such thatT(1+5x)=1+2x and T(5+24x)= -2-3x, then T(-1-4x)= ..........

Answers

The expression gave us the desired value of T(-1-4x) is 9 + 10x.

Linear transformations are a fundamental concept in mathematics that play a crucial role in various fields such as physics, engineering, and computer science.

Now, let's consider the given problem. We are given that T is a linear transformation on the vector space P1P1, which is the space of polynomials of degree at most one. Specifically, we are given two evaluations of T, namely T(1+5x) = 1+2x and T(5+24x) = -2-3x.

Using the linearity of T, we can express any polynomial in P1P1 as a linear combination of 1 and x, that is, p(x) = a + bx for some scalars a and b. Then, we can use the evaluations of T to determine its action on any such polynomial. For instance, let's consider the polynomial -1-4x. We can write this as -1-4x = -1(1+0x) - 4(x+0x), which is a linear combination of 1 and x.

Using the linearity of T, we can apply T to each term separately, obtaining:

T(-1-4x) = T(-1(1+0x) - 4(x+0x))

= T(-1(1+0x)) - T(4(x+0x))

= -1T(1+0x) - 4T(x+0x)

= -1(1+2x) - 4(-2-3x)

= 1-2x+8+12x

= 9+10x.

Therefore, T(-1-4x) = 9+10x.

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Convert the mixed numbers to improper fractions and solve

11) 9 1/2 + 1 1/2

12) 5 + 3 1/3

13) 2 4/5 + 16 2/5

14) 7 1/2 + 2 1/4

15) 8 5/6 + 3 2/3

16) 2 7/8 + 3 1/2 + 5 + 3 1/4

17) 5 1/2 + 2 1/3 + 9 1/6 + 2

18) 5 1/3 + 3 1/12 + 6 + 4 1/6

19) 2 1/15 + 7 2/5 + 5 + 3 1/3

Answers

Answer:

do you choose the best

Step-by-step explanation:

9 1/2 + 1 1/2

Converting to improper fractions: 9 1/2 = (9 * 2 + 1) / 2 = 19/2 and 1 1/2 = (1 * 2 + 1) / 2 = 3/2

Adding the fractions: 19/2 + 3/2 = (19 + 3) / 2 = 22/2 = 11/1 = 11

5 + 3 1/3

Converting to improper fractions: 5 = 5/1 and 3 1/3 = (3 * 3 + 1) / 3 = 10/3

Adding the fractions: 5/1 + 10/3 = (5 * 3 + 10) / 3 = 25/3

2 4/5 + 16 2/5

Converting to improper fractions: 2 4/5 = (2 * 5 + 4) / 5 = 14/5 and 16 2/5 = (16 * 5 + 2) / 5 = 82/5

Adding the fractions: 14/5 + 82/5 = (14 + 82) / 5 = 96/5

7 1/2 + 2 1/4

Converting to improper fractions: 7 1/2 = (7 * 2 + 1) / 2 = 15/2 and 2 1/4 = (2 * 4 + 1) / 4 = 9/4

Adding the fractions: 15/2 + 9/4 = (15 * 2 + 9) / 2 = 39/4

8 5/6 + 3 2/3

Converting to improper fractions: 8 5/6 = (8 * 6 + 5) / 6 = 53/6 and 3 2/3 = (3 * 3 + 2) / 3 = 11/3

Adding the fractions: 53/6 + 11/3 = (53 * 3 + 11 * 6) / 6 = 257/6

2 7/8 + 3 1/2 + 5 + 3 1/4

Converting to improper fractions: 2 7/8 = (2 * 8 + 7) / 8 = 23/8, 3 1/2 = (3 * 2 + 1) / 2 = 7/2, 3 1/4 = (3 * 4 + 1) / 4 = 13/4

Adding the fractions: 23/8 + 7/2 + 5 + 13/4 = (23 * 2 + 7 * 8 + 5 * 8 + 13 * 2) / 8 = 101/8

5 1/2 + 2 1/3 + 9 1/6 + 2

Converting to improper fractions: 5 1/2 = (5 * 2 + 1) / 2 = 11/2

Find the volume. The radius is 9m.

Find the volume. The radius is 9m.

Type number only. No units. Do not round till the end. Round answer to the nearest tenth.

V = ⁉️

Answers

Answer:

3392.9

Step-by-step explanation:

A little Pythagoras first, just to show how it works:

In a right-angled triangle, a ² + b ² = c ²

41² = radius² + 40²

radius = 9

Volume of cone = (1/3) X vertical height X π r ²

= (1/3) (40) π (9) ²

= 1080π

= 3392.9 to nearest tenth

FILL IN THE BLANK. For the statement Q R, identify the Inverse, Converse, Contrapositive and original statement. ______R→Q _____~R→~Q _____Q → R _____~Q→~R

Answers

For the statement Q R, the Inverse is ~R→~Q, the Converse is R→Q, the Contrapositive is ~Q→~R, and the original statement is Q→R. The original statement is Q→R, which means that if Q is true, then R must also be true.

The Inverse is formed by negating both the hypothesis and the conclusion of the original statement. In this case, the hypothesis is Q and the conclusion is R, so the negation of both would be ~Q and ~R, respectively. The resulting statement is ~R→~Q. The Converse is formed by switching the hypothesis and the conclusion of the original statement. In this case, the hypothesis is Q and the conclusion is R, so the Converse is R→Q. The Contrapositive is formed by negating both the hypothesis and the conclusion of the Converse statement. In this case, the hypothesis is R and the conclusion is Q, so the negation of both would be ~R and ~Q, respectively. The resulting statement is ~Q→~R.

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