1 point
Which exponential expression is not equal to 54.5-²?
B) 5-3.55
OD)
OA) (5-²)-¹
O c) (5-²) ¹

The probability of choosing a red marble followed by two blue marbles from the jar is 0.137 or approximately 13.7%.

The probability of choosing a red marble followed by two blue marbles from a jar containing 7 red, 5 green, 10 blue, and 3 yellow marbles.
To solve this problem, we need to first calculate the total number of possible ways to choose three marbles from the jar.

This is given by the combination formula:
nCr = n! / (r!(n-r)!)
Where n is the total number of marbles in the jar, and r is the number of marbles we want to choose.
Using this formula, we can find that the total number of ways to choose three marbles from the jar is:
nCr = 25! / (3!22!) = 2300
Next, we need to calculate the number of ways to choose a red marble followed by two blue marbles.

We can do this by using the multiplication principle of counting:
Number of ways to choose a red marble = 7
Number of ways to choose two blue marbles = 10C2 = 45
Total number of ways to choose a red marble followed by two blue marbles = 7 * 45 = 315
Finally, we can calculate the probability of choosing a red marble followed by two blue marbles by dividing the number of ways to choose a red marble followed by two blue marbles by the total number of possible ways to choose three marbles from the jar:
P(red, blue, blue) = 315 / 2300 = 0.137
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The probability of selecting all three infielders is relatively low, with only a 1.73% chance of happening.

We can use the formula for probability of an event as the ratio of favorable outcomes to total outcomes. In this case, we want to find the probability that all three selected players are infielders, which means we need to select three infielders from the total number of players.

The total number of ways to select 3 players out of 24 (8 pitchers + 7 infielders + 9 other players) is given by the combination formula:

C(24, 3) = (24!)/(3!21!) = 2024

The number of ways to select 3 infielders out of 7 infielders is given by:

C(7, 3) = (7!)/(3!4!) = 35

Therefore, the probability that all 3 selected players are infielders is:

P(all 3 infielders) = favorable outcomes/total outcomes

= C(7, 3) / C(24, 3)

= 35/2024

= 0.0173 or 1.73%

So, the probability of selecting all three infielders is relatively low, with only a 1.73% chance of happening.

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After substituting the given coordinate in the flux equation, the resulting flux dΦ through the patch can be expressed in terms of dA as dΦ = E⋅dA⋅cosθ

Here, E represents the electric field intensity, dA is the area of the patch, and cosθ is the angle between the normal vector of the patch and the electric field lines passing through it.The term dA represents the differential area of the patch and is used to calculate the total flux through the entire surface by integrating over the entire area. This integration process adds up the contributions of all the small patches of the surface.

Therefore, the flux through any small patch of the surface can be calculated using the above equation by substituting the appropriate values of E, dA, and cosθ. This formula is particularly useful in calculating the flux through curved surfaces or irregularly shaped patches.In summary, after substituting the given coordinate, the flux dΦ through the patch can be expressed in terms of dA using the formula dΦ = E⋅dA⋅cosθ, which helps in determining the total flux through the entire surface.

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Answer:

110°

Step-by-step explanation:

Sum of interior angles : 360

360-120-130 = 110

Answer:

x = 5 or -6

Step-by-step explanation:

We can find the zeros of the function:

[tex]y=x^2+x-30[/tex]

by setting y to 0, then solving for x.

To do this, we need to factor the right side of the equation.

[tex]0=x^2+x-30[/tex]

[tex]0=(x + 6)(x - 5)[/tex]

We can see that (x + 6) and (x - 5) are the two parts of this factorization because 6 and -5 add to 1 (which is the coefficient of the middle term), and they multiply to -30 (the constant term).

From this factored form, we can split the equation into two because we know that:

IF [tex]ab = 0[/tex],

THEN [tex]a=0[/tex]  OR  [tex]b=0[/tex]

So, we can solve for x in the following two equations:

[tex]x + 6 = 0[/tex]             [tex]x - 5 = 0[/tex]

[tex]\boxed{x = -6}[/tex]    OR   [tex]\boxed{x = 5}[/tex]

__

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The answers are explained in the solution.

Given that, a bus and a car have speed of 100km/hr and 120km/hr.

They are covering a distance of 340 km, they started travelling at 7:00 am,

Speed = distance / time

A) Bus travelled in 30 minutes = 100 × 0.5 = 20 km

After 30 minutes = 100 × 0.5 = 20 km

Total distance by bus in 1 hour = 40 km

Car covered in 30 minutes = 120 × 0.5 = 60 km

Distance between them = 60-40 = 20 km

Relative speed = 120-100 = 20 km/h

Time to catch up = 20/20 = 1 hour

Distance from Nairobi = 60 + (1 × 120) = 180 km

Therefore, the car catches up with the bus 180 km from Nairobi,

B) Time taken = 30 + 30 + 1 = 2 hours.

7:00am + 2 hours = 9:00 am

C) Time taken by bus to reach the destination = 340 / 100

= 3.4 hours

Hence, bus took 3.4 hours to reach the destination.

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According to Dr. Greg Tuggle's model, after 14 days, there are predicted to be approximately 29.35 (or about 29) infected people.

The formula f(x) = (2.025)x + 1 represents the predicted number of infected people as a function of the number of days since a particular strain of COVID was found.

To find how many people are infected after 14 days, we need to evaluate the function f(x) at x = 14:

f(14) = (2.025)14 + 1

f(14) = 28.35 + 1

f(14) = 29.35

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Homoscedasticity refers to the pattern of covariation that is constant around the regression line, whether the values are small, medium, or large.

Regression line is defined as the line which is used to estimate the unknown relationship between two variables and the relationship is linear.

The equation of this line is used to find or predict the value of one of the variable from the other.

Homoscedasticity is something which assumes that the variances are equal for different groups.

So, this refers to the pattern of covariation that is constant around the regression line, whether the values are small, medium, or large.

Hence the correct term is Homoscedasticity.

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Gender is the independent variable (IV) and Galvanic Skin Response (GSR) is the dependent variable (DV). This means that you are investigating how differences in gender might affect the GSR.

So, the correct is A. Gender: GSR

Gender, as the IV, refers to the classification of individuals as male, female, or other, while GSR, as the DV, is a physiological measure of emotional arousal, often used in psychological research.

By examining the relationship between these two variables, you aim to determine whether variations in gender have any impact on GSR levels.

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Answer:

a= 5.7

Step-by-step explanation:

Ok, when solving problems like this, it is important to do it step by step to minimize any mistakes.

Original Equation:

[tex]\frac{10a}{3} -1.5=17.5[/tex]

Then we add 1.5 to both sides

[tex]\frac{10a}{3} -1.5+1.5=17.5+1.5[/tex]

Simplify:

[tex]\frac{10a}{3}=19[/tex]

Multiply both sides by 3 to get rid of the denominator in the left side.

[tex]\frac{10a}{3} *3 = 19*3[/tex]

Simplify:

[tex]10a=57[/tex]

Divide both sides by 10 to isolate a

[tex]a = 5.7[/tex]

We can check our answer by plugging our value into the original equation!

Original equation:

[tex]\frac{10a}{3}-1.5=17.5[/tex]

New equation:

[tex]\frac{10(5.7)}{3}-1.5=17.5[/tex]

Multiply the numerator:

[tex]\frac{57}{3}-1.5=17.5[/tex]

Divide the fraction:

[tex]19-1.5= 17.5[/tex]

Subtract:

[tex]17.5=17.5[/tex]

as you can see, the values on both sides of the equation match.

So, a = 5.7

Answer:

Dependent

Step-by-step explanation:

This event is dependent, because the probability of grabbing a second shoe depends on whether or not you've already grabbed a shoe. If you haven't grabbed a shoe yet, the probability of grabbing a second shoe is zero. If you have already grabbed a shoe, the probability of grabbing a second shoe is 1 (assuming you have at least two shoes in your closet).

The equation of the scatter plot is given by the curve fitting of parabola equation y = -3.54x² + 41.7x + 73

Given data ,

Let the cleaning company models its profits be plotted on the graph

where the points are given by

A ( 1 , 100 ) , B ( 2 , 175 ) , C ( 3 , 150 ) , D ( 3 , 175 ) , E ( 5 , 175 ) , F ( 6 , 225 ) , G ( 7 , 175 ) , H ( 8 , 200 ) , I ( 9 , 150 )

Using the curve fitting model , we can plot the graph as

y = -3.54x² + 41.7x + 73

Hence , the equation of graph is y = -3.54x² + 41.7x + 73

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The complete question is attached below :

A cleaning company models its profits on the graph.

p(t)

Profit ($ thousands)

Donald will have $210 at the end of the year

Given that the principal amount Donald is having at the start of the year is $200 and the rate of interest per annum is 5%.

Since the interest is not compounded, at the end of the year the amount of interest he will be earning = 0.05 x 200 = $10 (since interest is not compounded)

From, the above analysis, Donald is earning $10 of interest per annum from $200.

Now, Total money Donald will be having in 1 year = principal amount + interest earned money = $200 + $10 = $210

From the above solution, we can conclude that Donals is having $210 in total for one year.

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The vertex form of the parabola is y = 2(x-1)² + 3.

We have,

Vertex = (1, 3)

passing point (-1, 11)

Use the vertex form of the quadratic:

y = a(x - h)² + k

Here h = 1 and k = 3

So, 11 = a(-1 -1)² + 3

11 = 4a² + 3

8 = 4a²

a² = 8/4

a² = 4

a =2

Then, the vertex form of parabola is

y = 2(x-1)² + 3

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The number of F ratios which calculated in a 3 way ANOVA is 7.

So, the correct answer is C.

In a three-way ANOVA, which involves three independent variables, a total of 7 F ratios are calculated.

This includes the main effect of each independent variable (3 F ratios), the two-way interactions between the independent variables (3 F ratios), and the three-way interaction between all three independent variables (1 F ratio).

Thus, the correct answer is c. 7 F ratios.

These F ratios help in determining the significance of each factor and interaction effect on the dependent variable in the analysis.

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The equation of the parabola in vertex form is y = (1/20)(x + 7)^2 + 1.

To write the equation of a parabola in vertex form, we use the equation:

y = a(x - h)^2 + k

where (h, k) represents the vertex of the parabola.

Given that the vertex is (-7, 1), we have h = -7 and k = 1. Substituting these values into the equation, we get:

y = a(x + 7)^2 + 1

Now, we need to find the value of 'a' to complete the equation. Since the parabola passes through the point (10, 309/20), we can substitute these coordinates into the equation:

309/20 = a(10 + 7)^2 + 1

309/20 = a(17)^2 + 1

309/20 = a(289) + 1

309/20 = 289a + 1

To simplify the fraction, we multiply both sides by 20:

309 = 20(289a + 1)

309 = 5780a + 20

Now, we solve for 'a':

5780a = 309 - 20

5780a = 289

a = 289/5780

a = 1/20

Substituting this value of 'a' back into the equation, we have:

y = (1/20)(x + 7)^2 + 1

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When solving a system of linear equations, the technique you're thinking of is called the "elimination method" or "adding/subtracting method."

Simultaneous equations, a system of equations Two or more equations in algebra must be solved jointly (i.e., the solution must satisfy all the equations in the system). The number of equations must match the number of unknowns for a system to have a singular solution.

There are four methods for solving systems of equations: graphing, substitution, elimination, and matrices.

The method you are referring to is known as the "elimination method" or "adding/subtracting method" for solving a system of linear equations.

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The interval that corresponds to the smallest area under a Normal curve is option D, μ - σ to Q3. This is because it covers only one standard deviation below the mean (μ - σ) and a smaller portion of the upper tail (up to Q3) compared to the other options. Smaller intervals generally correspond to smaller areas under the curve.

The interval that corresponds to the smallest area under a Normal curve is option D, μ - σ to Q3. This is because it covers only one standard deviation below the mean (μ - σ) and a smaller portion of the upper tail (up to Q3) compared to the other options. Smaller intervals generally correspond to smaller areas under the curve. Normal distributions are important in statistics and are often used in the natural and social sciences to represent real-valued random variables whose distributions are not known. Their importance is partly due to the central limit theorem. It states that, under some conditions, the average of many samples (observations) of a random variable with finite mean and variance is itself a random variable whose distribution converges to a normal distribution as the number of samples increases. Therefore, physical quantities that are expected to be the sum of many independent processes, such as measurement errors, often have distributions that are nearly normal.

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let firstly convert the mixed fraction to improper fraction, then get their product.

[tex]\stackrel{mixed}{1\frac{1}{2}}\implies \cfrac{1\cdot 2+1}{2}\implies \stackrel{improper}{\cfrac{3}{2}} \\\\[-0.35em] ~\dotfill\\\\ \cfrac{3}{2}\cdot \cfrac{2}{3}\implies 1\qquad \textit{one whole pizza}[/tex]

Answer: To find the area of the walkway surrounding the circular garden, we need to subtract the area of the circular garden from the area of the larger circle that includes the garden and the walkway.

The diameter of the larger circle is equal to the diameter of the garden plus the width of the walkway on both sides, which is 1 meter on each side. So the diameter of the larger circle is:

10 + 1 + 1 = 12 meters

The radius of the larger circle is half of its diameter, which is:

12 / 2 = 6 meters

The area of the larger circle is:

πr^2 = π(6)^2 = 36π square meters

The radius of the circular garden is half of its diameter, which is:

10 / 2 = 5 meters

The area of the circular garden is:

πr^2 = π(5)^2 = 25π square meters

Therefore, the area of the walkway surrounding the circular garden is the difference between the area of the larger circle and the area of the circular garden:

Area of walkway = Area of larger circle - Area of circular garden

= 36π - 25π

= 11π square meters

So the area of the walkway is 11π square meters.

The answer is A. PU(QU R) = {2, 4, 7, 8, 9, 11, 12, 13, 15}.

To find PU (QU R), we first need to find QU R, which means we need to take the union of Q and R and then find the union of that set with P.

Q U R = {2, 4, 7, 8, 11}

PU(QU R) = P U (Q U R) = {9, 12, 13, 15} U {2, 4, 7, 8, 11} = {2, 4, 7, 8, 9, 11, 12, 13, 15}

Therefore, the answer is A. PU(QU R) = {2, 4, 7, 8, 9, 11, 12, 13, 15}.

Note that the order of the sets does not matter when taking the union, and any repeated elements are counted only once in the final set.

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According to the data in the table, blue and gold are the two colors most likely to be the school colors of Amarjit's high school.

The table displays the results of a survey in which 600 students were asked to choose their school colors. Out of the six options presented, blue was the most popular choice with 210 students selecting it, while gold was the second most popular with 180 students selecting it. While other colors were also selected, none of them were chosen by more than 100 students, making it unlikely that they would be the primary school colors. However, it is important to note that there may be other factors that influence the selection of school colors, such as tradition or community preferences, which are not reflected in the survey data.

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Based on the data in the table, which two colors are most likely the school colors of Amarjit's high school?

Based on the limited information, it can be deduced that 1/5 of the ribbon is not in view.

In order to show the complete ribbon, we need to understand that in mathematical terms:

Since 4/5 of the ribbon is showing

This means that about 1- 4/5

= 1/5 of the ribbon is not in view.

With this knowledge, you can go ahead to complete your drawing, knowing that a full ribbon has a rectangular shape.

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(i) The probability of both events A and B happening, P(A and B), is 0.12. (ii) The probability of either event A or event B happening, P (A or B), is 0.58.

First, let's define what it means for events to be independent. Two events A and B are independent if the occurrence of one event does not affect the probability of the occurrence of the other event. In other words, the probability of both events occurring together is equal to the product of their individual probabilities: P (A and B) = P(A) x P(B).

Using this formula, we can find the probability of both events occurring together:
P (A and B) = P (A) x P(B) = 0.3 x 0.4 = 0.12

Now let's find the probability of either event occurring. We can use the formula P (A or B) = P (A) + P(B) - P(A and B).
We already know that P(A) = 0.3 and P(B) = 0.4, and we just found that P (A and B) = 0.12. Plugging those values into the formula, we get:
P (A or B) = 0.3 + 0.4 - 0.12 = 0.58
So, the probability of either event occurring is 0.58.
In summary:
(i) P (A and B) = 0.12
(ii) P (A or B) = 0.58

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Answer:

my answer is A

Step-by-step explanation:

if you work out the equation where you know that at the x intercept y=0 you will find A to be true

The seventh-grade class supplied 175 bags of snacks and 225 beverages for the school dance.

Finding the number of bags of snacks and beverages:

Let's assume that the number of bags of snacks supplied by the seventh-grade class is represented by 'x'. Since the number of beverages supplied is 50 more than the number of bags of snacks, we can represent the number of beverages supplied as 'x + 50'.

The total number of items supplied is 400, so we can write:

x + (x + 50) = 400

Simplifying this equation, we get:

2x + 50 = 400

Subtracting 50 from both sides, we get:

2x = 350

Dividing both sides by 2, we get:

x = 175

Therefore, the number of bags of snacks supplied by the seventh-grade class is 175. Using the fact that the number of beverages supplied is 50 more than the number of bags of snacks, we can calculate the number of beverages supplied as:

x + 50 = 175 + 50 = 225

Therefore, the number of beverages supplied by the seventh-grade class is 225.

So, the seventh-grade class supplied 175 bags of snacks and 225 beverages for the school dance.

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If we want to select r items from n items, and the order of the arrangement is important, then permutations are used. Permutations are a way of counting the number of ways to arrange a set of objects where order matters.

The number of permutations is denoted by nPr, where n is the number of items and r is the number of items selected. The formula for permutations is n! / (n-r)!, where n! is the factorial of n, which is the product of all positive integers from 1 to n. Permutations are used in a variety of fields, such as mathematics, statistics, computer science, and cryptography.

For example, in cryptography, permutations are used to create secure encryption keys. In statistics, permutations are used to calculate probabilities and make predictions. In computer science, permutations are used in algorithms for sorting, searching, and data analysis. Overall, permutations are a powerful tool for analyzing and manipulating data sets where the order of the arrangement is important.

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Answer:

Order from greatest to least: 25, 24, 23, 2 1/2

Step-by-step explanation:

Numbers: 23, 24, 25, 2 1/2

2 1/2 = 5/2 = 2.5

Order from greatest to least: 25, 24, 23, 2 1/2

This is a false statement because y-coordinates are different.

In mathematics, an ordered pair is a pair of elements, usually written in the form (x,y), where x and y are two values that are related in some way. In the case of (8,8), this represents an ordered pair where the value of x is 8 and the value of y is 8.

On the other hand, (9-1, 6+3) can be simplified using basic arithmetic operations. We first evaluate the expressions inside the parentheses, 9-1 and 6+3, which give us 8 and 9 respectively. Then we combine them into an ordered pair to get (8,9).

When we compare the two ordered pairs, we can see that the x-coordinates are the same, but the y-coordinates are different. Therefore, (8,8) is not equal to (9-1,6+3) and the statement "True or False(8,8) = (9-1,6+3)" is false.

Let's evaluate each side of the equation separately:

(8,8) represents an ordered pair with 8 as the x-coordinate and 8 as the y-coordinate.

(9-1, 6+3) evaluates to (8,9), since 9-1 = 8 and 6+3 = 9.

So we have:

(8,8) = (8,9)

This is a false statement, since the y-coordinates are different. Therefore, the answer is False.

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