Find the slope in each line

Select all the equations that have 9 as a solution.

bulgar [2K]

Answer: could I see the equtions pls

Step-by-step explanation:

6 0

2 years ago

Read 2 more answers

A survey of 73 students found that 37% were in favor of raising tuition to pave new parking lots. The standard deviation of the

KatRina [158]

Answer:

The value is $n_2 = 317$

Step-by-step explanation:

From the question we are told that

The sample size is n = 73

The proportion that in favor of raising the tuition is $\^{p} = 0.37$

The standard deviation is $s_1 = 0.098$

The required standard deviation $s_2 = 0.047$

Generally the requires standard deviation is mathematically represented as

$s_2 = s_1 * \sqrt{\frac{n_1}{n_2} }$

=> $\frac{s_2}{s_1} = \sqrt{\frac{n_1}{n_2} }$

=> $\frac{n_1}{n_2} =[\frac{s_2}{s_1} ]^2$

=> $\frac{73}{n_2} =[\frac{0.047}{0.098} ]^2$

=> $\frac{73}{n_2} =0.2300$

=> $n_2 = \frac{73}{0.2300}$

=> $n_2 = 317$

3 0

2 years ago

Home Videos Inc. surveys 450 households and finds that the mean amount spent for renting or buying videos is P135 a month and th

adell [148]

SOLUTION:

Case: Hypothesis testing

Step 1: Null and Alternative hypotheses

$\begin{gathered} H_0:\mu=P127.50 \\ H_1:\mu\leq P127.50 \end{gathered}$

Step 2: T-test analysis

$\begin{gathered} t=\frac{\hat{x}-\mu}{\frac{s}{\sqrt{n}}} \\ t=\frac{135-127.5}{\frac{75.25}{\sqrt{450}}} \\ t=2.144 \end{gathered}$

Step 3: t-test with the significance level

$\begin{gathered} t_{\alpha}=? \\ \alpha=0.05 \\ From\text{ }tables \\ t_{0.05}=1.654 \end{gathered}$

Step 4: Comparing

$t>t_{\alpha}$

So tail to reject the null hypothesis. There is enough evidence at a 0.05 level of significance to claim that the mean spent is greater than P127.50.

Final answer:

Yes, there is evidence sufficient to conclude that the mean amount spent is greater than P127.50 per month at a 0.05 level of significance.

6 0

11 months ago

The value of a car bought new for $28900 decreases 15% each year. Identify the function for the value of the car. Does the funct

Eva8 [605]

Answer:

V (t) = 28,900 - 4,335t

The function clearly represent a decay

Step-by-step explanation:

1. Let's review the information given to us to answer the question correctly:

Value of the car = $ 28,900

Annual depreciation = 15% = 0.15

2. Identify the function for the value of the car. Does the function represent growth or decay?

Let y represent the value of the car after t years of utilization, let p the price of the car and d, the annual depreciation, therefore:

V (t) = p - (d * t * p)

Replacing with the values we know:

V (t) = 28,900 - (0.15 * t * 28.900)

V (t) = 28,900 - 4,335t

The function clearly represent a decay.

8 0

3 years ago

1 and 2 are complementary angles. 1 and 3 are vertical angles. If

Marizza181 [45]

If angle 1 and angle 2 are complementary, then they add up to 90 degrees. We are given that angle 2 equals 52 degrees.

So we subtract and get our answer:

38

That's NOT the final answer.

The next step is:

Angle 1 and angle 3 are vertical angles.

Vertical angles are congruent.

So if angle 1 is 38, then angle 3 is also 38.

Now, supplementary angles add up to 180 degrees.

So that's the answer:

180-38=142

142 is the supplement of angle 3.

Hope it helps! :)

Answered by

$***ROSALIND***$

8 0

2 years ago