help pls with my homework​

Answer:

19

y = 6x - 11 it says the input is 5 so you input 5 as x

y = 6(5) - 11

y = 30 - 11

y = 19

The value of y in the equation y = 3^x for the point (-2, y) is 1/9

From the question, we have the following parameters that can be used in our computation:

y = 3^x

The above function is an exponential function

Exponential functions are mathematical functions that involve a base raised to a power

Also, we have

(-2, y)

Substitute the known values in the above equation, so, we have the following representation

y = 3^-2

Evaluate

y = 1/9

Hence, the value of y is 1/9

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Answer: -17a^4

Step-by-step explanation:

Combine like terms

12a^4 +(-29a^4)

(12a^4-12a^4) - (29a^4-12a^4) =

-17a^4

Hope this helps

Total cost = 20x + 200

Predicted revenue = 100 + 30x

profit = revenue – cost

= (100 + 30x) - (20x + 200)

= 100 + 30x - 20x - 200

Profit = 10x - 100

9 is the equivalent value of x from the given triangle.

The angle bisector theorem is concerned with the proportions of the two segments that a line that bisects the opposite angle divides a triangle's side into.

Applying the rule to solve the given question, we will have:

3x-7/12 = 3x +3/18

Cross multiply

12(3x+3) = 18(3x-7)36x + 36 = 54x - 126

Collect the like terms

36x-54x = -126 - 36

-18x = -162

x = 162/18

x = 9

Hence the value of x from the given figure is 9.

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The growth rate of the plant shown in the graph is 1/2 centimeter per week

From the question, we are to determine the growth rate of the plant

To determine the growth rate of the plant, we will determine the slope of the line

To determine the slope of the line passing through the points (1, 1/2) and (3, 1 1/2), we can use the slope formula:

Slope = (Change in y) / (Change in x)

We first calculate the change in y by subtracting the y-coordinate of the first point from the y-coordinate of the second point:

Δy = 1 1/2 - 1/2 = 1

Next, we calculate the change in x by subtracting the x-coordinate of the first point from the x-coordinate of the second point:

Δx = 3 - 1 = 2

Finally, we can calculate the slope by dividing the change in y by the change in x:

Slope = Δy / Δx = 1 / 2

The slope of the line is 1/2.

Hence, the growth rate is 1/2 centimeter per week

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Answer:

(-5, 2)

Step-by-step explanation:

We can see that the g(x) is a translated form of f(x) using the formula:

y = (x - h)³ + k,

where (h, k) is the origin of the graph's translation.

We can assign the following h and k values based on the given g(x):

g(x) = (x + 5)³ + 2

h = -5

k = 2

Finally, we can form an ordered pair (h, k):

(-5, 2)

Since t = -2.41 < -2.145, reject [tex]H_o[/tex] and conclude Ha, i.e. that there is a significant difference in the mean numbers of uncontaminated eggplants for the two disinfectants tested.

(a) Are you willing to assume that the underlying variances are equal?

Absolutely not! The variances can NOT be assumed equal.

H_o: sigma1^2 = sigma2^2

H_a: sigma1^2 =/ sigma2^2

F = s1^2 / s2^2 = 2.78095 / 0.17143 = 16.222

alpha = .05, dfnum = 15-1 = 14 and dfdenom = 15-1 = 14

F-critical values

= .33573 = F.INV(.025,14,14) using Excel

= 2.978588 = F.INV(.025,14,14) using Excel

Since F = 16.222 > 2.978588, reject H_o and conclude H_a, i.e. that the population variances significantly differ.

Or, using the p-value from the TI-84... p-value = 5.59E-6 = .00000559 < alpha = .05, so we can reject H_o and conclude H_a, i.e. that the population variances significantly differ.

(b) Using the information from part a), are you willing to conclude that there is a significant difference in the mean numbers of uncontaminated eggplants for the two disinfectants tested ?

Note: Since the population variances ARE significantly different, we can NOT use the pooled t-test as rapunzel shows.

H_o: mu1 = mu2

H_a: mu1 =/ mu2

t = (xbar1-xbar2) / sqrt(s1^2/n1 + s2^2/n2)

t = (3.73 - 4.80) / sqrt(2.78095/15 + .17143/15)

Note: We do NOT square the variances. They are already squared.

t = -2.41

t-critcal values

df = smaller of n1-1 and n2-1, i.e. the smaller of 15-1 = 14 and 15-1 = 14

--> df = 14

left tail critical value = -2.145 <-- alpha/2 = .025, df = 14

right tail critical value = +2.145 <-- alpha/2 = .025, df = 14

Since t = -2.41 < -2.145, reject H_o and conclude H_a, i.e. that there is a significant difference in the mean numbers of uncontaminated eggplants for the two disinfectants tested.

Or, using the p-value from the TI-84... p-value = .028486... < alpha = .05, so we can reject H_o and conclude H_a, i.e. that there is a significant difference in the mean numbers of uncontaminated eggplants for the two disinfectants tested.

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An experiment published in The American Biology Teacher studied the efficacy of using 95% ethanol and 20% bleach as a disinfectant in removing bacterial and fungal contamination when culturing plant tissues. The experiment was repeated 15 times with each disinfectant, using eggplant as the plant tissue being cultured. Five cuttings per plant were placed on a petri dish for each disinfectant and stored at 25 centigrades for 4 weeks. The observation reported was the number of uncontaminated eggplant cuttings after the 4-week storage.

Disinfectant 95% Ethanols 20% Bleach

Mean 3.73 4.80

Variance 2.78095 0.17143

Pooled variance: 1.47619

Are you willing to assume that the underlying variances are equal?

Using the information from part a), are you willing to conclude that there is a significant difference in the mean numbers of uncontaminated eggplants for the two disinfectants tested ?

Answer: Your welcome!

Step-by-step explanation:

N′(−11, −2), M′(−8, −1), O′ (−11, −5)

The image coordinates of N′M′O′ if the preimage is translated 7 units to the left are N′(−11, −2), M′(−8, −1), O′ (−11, −5). This is calculated by subtracting 7 from the x-coordinate of each point in the original triangle NMO. For example, the x-coordinate of point N in the original triangle is -4, so the x-coordinate of point N′ in the translated triangle is -4 - 7 = -11. The y-coordinate of point N does not change, so the y-coordinate of point N′ is also -2.

Answer:

To translate the triangle 7 units to the left, we need to subtract 7 from the x-coordinates of each vertex:

N' = (N_x - 7, N_y) = (-4 - 7, -2) = (-11, -2)

M' = (M_x - 7, M_y) = (-1 - 7, -1) = (-8, -1)

O' = (O_x - 7, O_y) = (-4 - 7, -5) = (-11, -5)

Therefore, the image coordinates of N'M'O' are (-11, -2), (-8, -1), and (-11, -5).

So the answer is N′(−11, −2), M′(−8, −1), O′ (−11, −5).

Answer:

the third one

Step-by-step explanation:

the third one

Answer:

Before Tax Price: $40.00

Sale Tax: 5.00% or $2.00

After Tax Price: $42.00

Step-by-step explanation:

Answer:

42 dollars

Step-by-step explanation:

When doing tax problems, we need to memorize the formula of:

price + tax • price = price with sales tax.

This formula works because you have the initial percentage of the cost, with the added tax, which gives the extra value--then added together it gives the sales cost price.

So let's plug our numbers in

40 + (0.05 or 5%) • 40 = price with sales tax

40 + 2 = price with sales tax

42 = price with sales tax

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Sergio's new balance is $87

Sergio's savings showed a previous balance of $234.95 and interest of $1.06

The statement also showed deposits of $123.42 and $50.66 and withdrawals of $323.09

The new balance can be calculated by adding the previous balance, interest, deposits in the statement and then subtract the sum total from the withdrawal amount

234.95 + 1.06 + 123.42 + 50.66 - 323.09

= 410.09 - 323.09

= 87

Hence Sergio's new balance after adding the deposits, previous balance then subtracting from the withdrawal is $87

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Answer:

The given equation is of the form:

((x - h)^2)/a^2 - ((y - k)^2)/b^2 = 1

Comparing it with the given equation:

((x - 3)^2)/10 - ((y + 5)^2)/9 = 4

We can rewrite the equation in the standard form by dividing both sides by 4, then adding (y+5)^2/9 to both sides:

((x - 3)^2)/40 - ((y + 5)^2)/36 = 1

Now, we can see that the equation is in the standard form of a hyperbola. The center of the hyperbola is (3, -5), the distance between the center and each vertex is sqrt(10) in the x-direction and sqrt(9) in the y-direction, and the hyperbola opens to the left and right.

Answer:

The model represents the division of the larger rectangle (3.5 units wide) into 4 equal parts, and shading 1 part of it.

This means that the division is 3.5 divided into 4 parts, with each part being equal to the smaller rectangle with a width of 0.875.

Therefore, the expression represented by the model is:

B. 3.5 divided by 0.875

Step-by-step explanation:

The Central Angle of each color is:

Red= 100°

Blue= 150°

Green= 50°

Purple = 60°

According to the definition of a central angle in geometry, it is the angle that the arc of a circle occupies in its centre. The angle's arms are formed by the two radii. Knowing the ratio of the curve to the circle using the central angle is helpful.

To draw a pie chart we have to find the central angle.

For Red

= 20/72 x 360

= 100 degree

For Blue

= 30/72 x 360

= 150

For Green

= 10/72 x 360

= 50

For Purple

= 12/ 72 x 360

= 60

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The value of probability that they have pulse rates with mean less than 78 beats per min would be; 0.5948

The term probability refers to the likelihood of an event occurring. Probability means possibility. It is a branch of mathematics that deals with the occurrence of a random event.

Given that If 16 female are randomly selected the Mean is 75 beats per min And, Standard deviation is, 12.5

Hence, We get;

z = (78 - 75) / 12.5

z = 3/12.5

z = 0.24

Hence, The probability is, 0.5948

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Answer:

To solve this problem, we can use the principle of inclusion-exclusion. We first count the total number of ways to assign rooms to the Italians and Englishmen without any restrictions. Then, we subtract the number of ways that violate the Italian's restriction, and the number of ways that violate the Englishmen's restriction. Finally, we add back the number of ways that violate both restrictions.

Step 1: Total number of ways to assign rooms

There are 8 rooms, so there are 8 choices for the first person, 7 choices for the second person, and so on. Therefore, there are 8 x 7 x 6 x 5 x 4 = 6,720 total ways to assign rooms to the Italians and Englishmen without any restrictions.

Step 2: Number of ways that violate the Italian's restriction

There are 3 blue rooms and 2 yellow rooms, so there are 3 x 2 = 6 ways to assign rooms to the Italians that violate their restriction. For each of these ways, there are 6 x 5 x 4 = 120 ways to assign rooms to the Englishmen. Therefore, there are 6 x 120 = 720 ways that violate the Italian's restriction.

Step 3: Number of ways that violate the Englishmen's restriction

There are 3 green rooms and 2 yellow rooms, so there are 3 x 2 = 6 ways to assign rooms to the Englishmen that violate their restriction. For each of these ways, there are 5 x 4 x 3 x 2 = 120 ways to assign rooms to the Italians. Therefore, there are 6 x 120 = 720 ways that violate the Englishmen's restriction.

Step 4: Number of ways that violate both restrictions

If the Italians are in blue rooms and the Englishmen are in yellow rooms, there is only 1 choice for this assignment. If the Italians are in yellow rooms and the Englishmen are in green rooms, there are also only 1 choice for this assignment. Therefore, there are 2 ways that violate both restrictions.

Step 5: Calculate the final answer

Using the principle of inclusion-exclusion, we can calculate the number of ways that satisfy all the restrictions as follows:

Total number of ways - Number of ways that violate the Italian's restriction - Number of ways that violate the Englishmen's restriction + Number of ways that violate both restrictions

6,720 - 720 - 720 + 2 = 5,282

Therefore, there are 5,282 ways to assign rooms to the two Italians and three Englishmen so that each of them is alone in one room, while satisfying their loyal guest preferences.

Step-by-step explanation:

Answer:

I can not help  you do you  have picture that i can use so i can give u the correct answer

Step-by-step explanation:

Answer:

ik....

Step-by-step explanation:

Therefore , the solution of the given problem of trigonometry comes out to be forms an angle with the horizontal of about 11.71 degrees.

A relationships between cubic splines and triangle maths  astrophysics is believed to have been created when the various fields came together. Many metric problems can be solved or the results of their calculation can indeed be determined with the help of precise mathematical methods. Trigonometry is the study of six basic trigonometric calculations. .

Here,

The tangent function, which is referred to as the ratio of the opposite side (the height drop) to the adjacent side, can be used to determine the angle that Highland Drive forms with the horizontal (the horizontal distance).

The angle's tangent in this situation can be written as:

=> tan(θ) = adjacent/opposite = 14.2/70

We can use a computer to determine that the angle's tangent is roughly 0.2029.

By taking the inverse tangent (also referred to as the arctangent) of this number, we can determine the angle itself:

=> 11.71 degrees are equal to theta = arctan(0.2029)

Highland Road thus forms an angle with the horizontal of about 11.71 degrees.

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Answer:

A business person will use algebra to determine whether a piece of equipment does not lose its worth if it is in stock.

Step-by-step explanation:

Answer:

Julius: 52

John: 47

Grace: 51

Step-by-step explanation:

Let marks scored by Julius, John and Grace be x, y and z respectively

From the information given,
"Julius scored 5 more marks " →   x = y + 5  (1)

"who in turn scored 4 marks less than Grace" →  y = z - 4  (2)

Substitute y =  z - 4 in equation x = y + 5

→  x = (z-4) + 5

→ x = z - 4 + 5

→ x = z + 1

"The total mark scored by the three students was 150":
x + y + z = 150      (3)

Substitute x = z - 1 and y = z - 4 in equation (3):

←  (z + 1) + (z - 4) + z = 150
→  z -+ 1 + z - 4 + z = 150

→  z + z + z +  1 -  4 = 150
→  3z - 3 = 150

→  3z = 150 + 3 = 153

→ z = 153/3 = 51
So Grace's mark was 51

John's mark y = z - 4 = 51 - 4 = 47

Julius' mark x = y + 5 = 47 + 5 = 52

Substitute for y from (2) in (4):
2(z - 4) + z = 145

2z - 8 = 145

The solutions to the quadratic equation [tex]X^2 + 7X = 0[/tex] are X = 0 and X = -7.

What is quadratic equation?

A quadratic equation is a polynomial equation of the second degree, which means it contains one or more terms that are raised to the power of two. The standard form of a quadratic equation is:

[tex]ax^2 + bx + c = 0[/tex]

where a, b, and c are constants, and x is the variable. The value of x that satisfies the equation is called the root or solution of the quadratic equation.

Quadratic equations can have one, two, or no real solutions, depending on the value of the discriminant [tex]b^2 - 4ac[/tex]. If the discriminant is positive, the equation has two real solutions; if it is zero, the equation has one real solution; and if it is negative, the equation has no real solutions but two complex solutions.

To solve the quadratic equation [tex]X^2 + 7X = 0[/tex] by factoring, we first write it in the standard form:

[tex]X^2 + 7X = 0[/tex]

Next, we factor out the common factor X:

X(X + 7) = 0

Now, we can apply the zero product property, which states that if the product of two factors is zero, then at least one of the factors must be zero. In this case, we have:

X = 0 or X + 7 = 0

Solving for X in each equation, we get:

X = 0 or X = -7

Therefore, the solutions to the quadratic equation X^2 + 7X = 0 are X = 0 and X = -7.

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Question:

[tex]X^2 + 7X = 0[/tex]

Solving Quadratics by Factoring

Answer:25% of the number is 30

Step-by-step explanation:

Let's call the number we're looking for "x". We can use the information given in the problem to set up two equations:

10% of x is 12:

0.1x = 12

35% of x is 42:

0.35x = 42

Now we can solve for x:

0.1x = 12

x = 120

0.35x = 42

x = 120

We get the same value for x from both equations, which confirms that our solution is correct. Now that we know x = 120, we can find 25% of that number:

25% of 120 = 0.25 x 120 = 30

Therefore, 25% of the number is 30.

The measurement of angle x in the given figure is 11°

An angle is the figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the angle.

Angles formed by two rays lie in the plane that contains the rays. Angles are also formed by the intersection of two planes.

Given is a figure, we need to find the measure of angle x,

The labeled figure is attached,

We have,

∠ 1 = 85° [vertically opposite angles]

∠ 3 = 96° [corresponding angles between parallel lines]

∠ 2 + ∠ 3 = 180° [linear pair angles]

∠ 2 = 180°-96°

∠ 2 = 84°

Now,

∠ 1 + ∠ 2 + x = 180° [angles sum property of a triangle]

85° + 84° + x = 180°

x = 180°-169°

x = 11°

Hence, the measurement of angle x in the given figure is 11°

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Answer:

[tex]x[/tex] = 67 , [tex]y[/tex] = 113 , [tex]z[/tex] = 67

Step-by-step explanation:

What we need to know:

A parallelogram has two pairs of equal angles

Opposite angles are equal

Angles in a quadrilateral add up to 360

1) Find out as many angles we can

We know that the opposite angles are equal, this means that y would be equal to 113

2) Find the remaining angles

We already know that two of our angles are 113, this means that our total is 226 for now. We have two angles left which are equal so to find them we have to subtract 226 by 360 then divide by 2

Hope this helps, have a lovely day! :)

Answer:

x = 67

y = 113

z = 67

Step-by-step explanation:

The properties of a parallelogram are:

Two angles are said to be adjacent when they share a common vertex.

Therefore, both angle x and angle z are adjacent to the angle that measures 113°.

Since adjacent angles in a parallelogram are supplementary:

⇒ x° + 113° = 180°

⇒ x° = 67°

⇒ x = 67

Similarly:

⇒ z° + 113° = 180°

⇒ z° = 67°

⇒ z = 67

As opposite angles in a parallelogram are equal:

⇒ y° = 113°

⇒ y = 113

Answer:

[tex]2304[/tex][tex]\pi[/tex]

Step-by-step explanation:

V = [tex]\frac{4}{3} \pi r^{3}[/tex]

V = [tex]\frac{4}{3} *\pi * 12*12*12[/tex]

Use 3 to divide one of the 12 which will be equal to 4

V = [tex]4 *\pi *4*12*12[/tex]

V = [tex]2304\pi[/tex]

Answer: [tex]\sqrt{\text{x}-7}-10[/tex]

Work Shown:

[tex]f(\text{x}) = \sqrt{\text{x}-6}-10\\\\f(\text{x}-1) = \sqrt{\text{x}-1-6}-10\\\\f(\text{x}-1) = \sqrt{\text{x}-7}-10[/tex]

Explanation:

I replaced each copy of x with x-1. Then I combined like terms. Doing this will shift the graph 1 unit to the right.

The probability of a false positive test result is approximately 0.1702 or 17.02%.

The person who will suffer from a false positive are the subjects who aren't drug users.

From the given data, we can see that there are a total of 46 + 1 = 47 positive test results, out of which 8 are false positives (i.e., the subject is not a drug user).

The probability of a false positive test result is:

Probability of false positive = Number of false positives / Total number of positive test results.

Probability of false positive = 8 / 47

Probability of false positive = 0.1702

Therefore, the probability of a false positive test result is approximately 0.1702 or 17.02%.

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Answer: $4.35

Step-by-step explanation:

320.38 rupees / 73.6500 rupees = $4.35