Which of the following relations is not a function?
{(0,0),(1,0),(2,0)}
{(1,2),(3,-5),(-1,7)}
{(7,-1),(3,-2),(5,-2)}
{(-1,3)(4,2),(-1,5)}

The correct expression which can be used to find AC is,

⇒ 7.8 (cos 23°)

We have to given that;

A triangle ABC shown in figure.

Now, We can formulate;

cos 23° = AC / AB

cos 23° = AC / 7.8

AC = 7.8 (cos 23°)

Thus, The correct expression which can be used to find AC is,

⇒ 7.8 (cos 23°)

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Answer:

roast beef

Step-by-step explanation:

you change the fraction ham changes to 2 and 5/20 turkey changes to 1 and 4/20 and roast beef changes to 15/20 roast beef is the most

Using trigonometric ratio, the height of the ground above the ground to the nearest hundredth is 44.85 ft

The situation forms a right angle triangle.

Right angle triangle has one of its angles as 90 degrees. The sides and angles can be found using trigonometric ratios.

Therefore, the length of the string is the hypotenuse side of the triangle formed . The opposite side of the triangle is the height of the kite form the ground.

Therefore, the height of the kite form the ground can be found as follows;

sin 33° = opposite / hypotenuse

sin 33° = h / 75

cross multiply

h = 75 × sin 33

h = 40.8479276261

h = 40.84

The height of kite from ground = 40.847 + 3.5  = 44.3479276261 = 44.85 ft

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Answer:

44.35

Step-by-step explanation:

i did it

Answer: Distributive Property

Step-by-step explanation:

Answer: A and D

Step-by-step explanation: \(\sqrt{400\) is a rational number because when calculate the square root 400 you get 20. \(\sqrt\\400\) is a rational number. The area of the square would be perfect square because 20*20=400. A and D are the correct answers.

Answer: y = 2x - 1/2

Step-by-step explanation:

1. graph the first line

2. shift it down enough to get the correct y intercept

3. keep the slope the same

4. done

Step-by-step explanation:

You will get the x and y interceptions by substituting. To make it easier, put x=0 , 3, -3 and solve the equation.

Hope this helps you.

Answer: D.

Step-by-step explanation:

You can start out with the form AX = B and solve for matrix X that would yield the answer

Then X = (A^-1)(B)

A = [1    -1]

      [1     1]

A^-1 = (1/(1 - (1)(-1)))*[1    1]

                             [-1   1]

which can be written as (1/2) * [1    1]

                                                  [-1   1]

B = [26]

     [6]

(A^-1)(B) = (1/2)*[1    1] [6]

                        [-1   1] [26]

= (1/2)*[32]

          [20]

= [16]

  [10]

Answer:

0.05/min or plus 0.25 every 5 minutes

Step-by-step explanation:

To find the unit rate divide 0.25 by 5:

0.25 ÷ 5= 0.05

OR

After every 5 minutes, Eric has traveled 0.25 miles.

Hope this helps!

Answer:

2/15

Step-by-step explanation:

slow heart rate and blue eyes (2) over total (15)

2/15 doesn't simplify

Answer:

13/100 is my final answer

Step-by-step explanation:

First, in order to get blue eyes, you need to be part of 40% thats not much but not little either. Then in order to get A fast heart rate out of that, you need to be part of the 26% out of 40% and that leaves you with 13 to 14 %.

I say 13 to 14 because both the 13 and 26 % came from a decimal that went on forever but due to rounding it can be 27 gets fast heart rate with 13 percent gets slow heart rate and blue eyes or 14 gets it and 26 gets faster

Hope this helped.

A brainliest is always appreciated.

Answer:

i think it's C sorry if it's wrong

Step-by-step explanation:

i took the test and got it right so

Answer:

The third option

Step-by-step explanation:

1. To determine whether a relation is a function given a graph, use the

following criterion:

2. As you can see, if you draw a vertical line at a specific place in the third graph, it will go through 2 or more points.

Therefore, the correct answer is the third option/graph.

Answer:

\( \boxed{if \: b= - 2 : {b}^{2} = { (- 2)}^{2} = 4}\)

68% of the loan applicants fall within a score of 608 and 672.

First, we need to find the Z-scores for the lower and upper limits of the range. We use the following formula:

Z = (x - μ) / σ

Where x is the credit score, μ is the population mean credit score (640), and σ is the population standard deviation (16).

So,

Z_lower = (608 - 640) / 16 = -1.5

Z_upper = (672 - 640) / 16 = 1.5

This tells us that credit scores of 608 and 672 are 1.5 standard deviations below and above the population mean credit score, respectively.

Assuming a bell-shaped curve, we know that 68% of data falls within one standard deviation of the mean, so 34% falls below or above one standard deviation. Since we are looking for the number of loan applicants that fall within a score of 608 and 672, which is 2 standard deviations of the mean, we need to multiply the 34% by 2.

Therefore, 34% * 2 = 68% of the loan applicants fall within a score of 608 and 672.

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False, r2adj is the adjusted coefficient of determination that can exceed r2 if there are several weak predictors.

R2adj is the adjusted coefficient of determination and takes into account the number of predictors in the model. It penalizes the addition of insignificant predictors that do not improve the model fit.

R2, on the other hand, is the coefficient of determination and measures the proportion of variability in the dependent variable that is explained by the independent variables in the model.

It is possible for R2 to increase when weak predictors are added, but this increase is not necessarily mean that the predictors do not have a significant impact on the outcome.

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The question is -

R2adj can exceed R2 if there are several weak predictors. true or false?

(a) The center of the sphere is in the first octant and is tangent to the xz-plane and to the yz-plane. This means that the center of the sphere is at a point of the form (a,b,5) where a,b≥0. The distance from the origin to the center of the sphere is  \(\sqrt{43}\), so we have \(x^{2} +x^{2} +(5-0)^{2} =43\) This gives us \(a^{2} +b^{2} =38\)

The radius of the sphere is the distance from the center of the sphere to the point where the sphere touches the xz-plane. This distance is equal to the length of the hypotenuse of a right triangle with legs of length a and b. Therefore, the radius of the sphere is \(\sqrt{a^{2}+ b^{2} } =\sqrt{38}\)

The equation of the sphere is \((x-a)^{2}+ (y-b)^{2}+ (z-5)^{2} =38\)

(b) The point where the sphere touches the xz-plane is (a,0,5). The distance between the origin and this point is \(\sqrt{a} ^{2}+\sqrt(5-0)^{2} =\sqrt{a^{2} +25}\)

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Answer:

how much wood do you need

Therefore, the smaller part = 41.29 and the greater part = 57 - 41.29 = 15.71.

Let the smaller part be x.

Then, the greater part = 57 - x

According to the question,

1/2 (57-x) = 11 + 1/5x

Solve for x:

1/2 (57-x) - 1/5x = 11

7/10 (57-x) = 11

7/10 (57-x) - 11 = 0

7/10 (57-x) = 11

57-x = 11 * (10/7)

57-x = 15.71

x = 57 - 15.71

x = 41.29

The equation for this problem is:

x + y = 57

1/2 x = 11 + 1/5 y

y = 57 - x

1/2 x = 11 + 1/5 (57 - x)

2x = 11 + 57 - 5x

7x = 68

x = 68/7

x = 9.71

y = 57 - x

y = 57 - 9.71

y = 47.29

Therefore, the two parts of 57 are 9.71 and 47.29.

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In a large-sample test with a significance level of 0.01, we are testing the null hypothesis H:p = 0.2 against the alternative hypothesis H:p > 0.2. We are given the alternative value p = 0.21 and asked to calculate the power B(p = 0.21) for different sample sizes (n = 100, 2500, 10,000, 40,000, and 90,000). We are also asked to compute the P-value when the observed proportion f is 0.21 for sample sizes of 100, 2500, 10,000, and 40,000. Lastly, we need to determine whether it is reasonable to use a level 0.01 test with a sample size of 40,000.

a. To compute the power B(p = 0.21) for different sample sizes (n = 100, 2500, 10,000, 40,000, and 90,000), we need to find the probability of rejecting the null hypothesis when the alternative value is p = 0.21. Using the normal approximation to the binomial distribution, we calculate the test statistic Z = (f - p) / sqrt(p(1 - p) / n), where f = 0.21 is the observed proportion. We then find the corresponding area under the standard normal curve to the right of the test statistic to obtain the power. Repeat this process for each sample size to compute the respective powers.

b. To compute the P-value when f = 0.21 for different sample sizes (n = 100, 2500, 10,000, and 40,000), we calculate the test statistic Z as before and find the area under the standard normal curve to the right of the test statistic. This gives us the probability of observing a test statistic as extreme or more extreme than the observed test statistic, assuming the null hypothesis is true.

c. Whether it is reasonable to use a level 0.01 test in conjunction with a sample size of 40,000 depends on several factors. A larger sample size generally provides greater power and reduces the probability of a Type II error. If a small effect size is of interest or if high precision is required, a large sample size like 40,000 may be reasonable. However, it is important to consider the cost, feasibility, and practicality of obtaining such a large sample size. Additionally, other factors such as the context of the study, the importance of the decision being made, and the potential impact of Type I and Type II errors should be taken into account when determining the appropriateness of the chosen level and sample size.

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Answer:

Step-by-step explanation:

these are two different questions .

first i solve first

position of submarine= -250/3 meters below see level

height descended=120 % of 250/3=120/100 ×(250/3)=300,00/300=100 m

new location=-250/3+(-100)=-650/3 below see level.

2nd question

position of submarine=-250 2/3=-752/3 m below see level

height descended=120 5/8=965/8 m =-965/8 m below see level

new positin=-752/3+(-965/8)=-(6016+2895)/24=-8911/24=-371 7/24m below sesa level.

Answer:

A = s^2

Step-by-step explanation:

The area of a square can be found by multiplying the side by its side.

A = side x side = s^2

So if the side of a square is 3, to find the are you would multiply 3 times 3. Giving you an area of 9.

This means we can say with 95% confidence that the true proportion of customers who pay using a credit card in the population is between 0.832 and 0.908.

To compute the 95% confidence interval for the population proportion of customers who pay using a credit card, we can use the following formula:

CI = p ± zsqrt((p(1-p))/n)

where:

CI = confidence interval

p = sample proportion (in this case, 0.87)

z = z-score for the desired confidence level (95% in this case), which is 1.96

n = sample size (in this case, 400)

Plugging in the values, we get:

CI = 0.87 ± 1.96sqrt((0.87(1-0.87))/400)

CI = 0.87 ± 0.038

CI = (0.832, 0.908)

Therefore, the 95% confidence interval for the population proportion of customers who pay using a credit card is 0.832 to 0.908.

Option A, 0.84 to 0.90, is the correct answer. This means we can say with 95% confidence that the true proportion of customers who pay using a credit card in the population is between 0.832 and 0.908.

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Answer:

480 grams

Step-by-step explanation:

Set a proportion: if 150 cm of the copper pipe weighs 800 grams, 90 cm of the copper pipe weigh x.

Let's find x:

150 cm : 800 grams = 90 cm : x

x = (800×90)÷150 = 480 grams

Answer:

480g

Step-by-step explanation:

the person above me is correct I checked the math.

Answer:

S₁₀ = 25

Step-by-step explanation:

the sum to n terms of an arithmetic sequence is

\(S_{n}\) = \(\frac{n}{2}\) [ 2a₁ + (n - 1)d ]

where a₁ is the first term and d the common difference

here a₁ = 25 and d = a₂ - a₁ = 20 - 25 = - 5 , then

S₁₀ = \(\frac{10}{2}\) [ (2 × 25) + (9 × - 5)]

     = 5(50 - 45)

    = 5 × 5

    = 25

The equation that must be true is the one in the first option:

f(-3) = -5

We know that the point (–3, –5) is on the graph of a function.

Rememeber that the usual point notation is (input, output), and for a function the notation used is:

f(input) =  output.

In this point we can see that:

input = -3

output = -5

Then the equation that we know must be true is:

f(-3) = -5, which is the first option.

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Answer:

See proof below.

Step-by-step explanation:

Statements                                           Reasons

1. Seg. DE congr seg GF                     1. Given

2. <1 congr. <2                                     2. Given

3. DE || GF                                            3. Theorem: If 2 lines are cut by a transversal such that alt int angle are congruent, then the lines are parallel

4. DEFG is a parallelogram                4. Theorem: If a quadrilateral has two sides that are congruent and parallel, then it is a parallelogram.

Answer:

\(108\pi\) or approx. \(339.3 m^{2}\)

Step-by-step explanation:

The question asks us to find the total surface area of the given hemisphere. The question gave us the formula for total surface area of a sphere, \(SA_{tot} =4\pi r^2\). But we need it for a hemisphere, so multiply the equation by \(\frac{1}{2}\).

\(SA} = (\frac{1}{2}) 4\pi r^2\) => \(SA} =2\pi r^{2}\)

We also need the area of the base, which is circle. \(A_{circle}=\pi r^{2}\).

Now add these equations together to get our equation.

\(SA_{tot} =2\pi r^2 +\pi r^{2}\) => \(SA_{tot} =3\pi r^2\)

Now we have the proper equation for total surface area of a hemisphere, \(SA_{tot} =3\pi r^{2}\). Plug in the value of \(r\) which is given in the problem, \(r=6m\).

=> \(SA_{tot} =3\pi (6)^{2}\) => \(SA_{tot} =3\pi (36)\) => \(SA_{tot} =108\pi m^{2}\) or approx. \(339.3 m^{2}\)

Answer:

40

Step-by-step explanation:

40 divided by 1/4 = 10

25% = 1/4

Answer:

40

Step-by-step explanation:

We Know

25% of x is 10

Find x

We Take

10 x 4 = 40

So, 25% of 40 is 10

Answer:

\(t = \frac{1}{3} \)