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3 years ago

14

Home Depot sells 400 stoves every day. Home Depot sells 125 more microwaves per day than stoves. Which equation can be used to f

ind x, the total number of stoves and microwaves Home Depot sells in one day?

1 answer:

Nookie1986 [14]3 years ago

4 0

Answer:

400

Step-by-step explanation:

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What number is halfway between -5 and -9.2?

xxTIMURxx [149]

The number(s) might be -5.5 or -6. I believe the answer might've been -6 but I'm not so sure about that. Please let me know.

HOPE THIS HELPS YOU..... IF NOT I'M SO SORRY

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4 years ago

It is thought that the front cover and the nature of the first question on mail surveys influence the response rate. An article

denis-greek [22]

Answer:

The null and alternative hypothesis are:

$H_0: \pi_1=\pi_2\\\\H_a:\pi_1\neq \pi_2$

Test statistic z = -0.29

P-value = 0.7709

Fail to reject H0. The data does not suggest that the front cover and nature of the first question on mail surveys influence the response rate.

Step-by-step explanation:

This is a hypothesis test for the difference between proportions.

The claim is that the return rate is different for the Plain cover and the Skydiver cover.

Then, the null and alternative hypothesis are:

$H_0: \pi_1-\pi_2=0\\\\H_a:\pi_1-\pi_2\neq 0$

The significance level is 0.1.

The sample 1 (plain cover), of size n1=209 has a proportion of p1=0.493.

$p_1=X_1/n_1=103/209=0.493$

The sample 2 (skydiver cover), of size n2=215 has a proportion of p2=0.507.

$p_2=X_2/n_2=109/215=0.507$

The difference between proportions is (p1-p2)=-0.014.

$p_d=p_1-p_2=0.493-0.507=-0.014$

The pooled proportion, needed to calculate the standard error, is:

$p=\dfrac{X_1+X_2}{n_1+n_2}=\dfrac{103+109}{209+215}=\dfrac{212}{424}=0.5$

The estimated standard error of the difference between means is computed using the formula:

$s_{p1-p2}=\sqrt{\dfrac{p(1-p)}{n_1}+\dfrac{p(1-p)}{n_2}}=\sqrt{\dfrac{0.5*0.5}{209}+\dfrac{0.5*0.5}{215}}\\\\\\s_{p1-p2}=\sqrt{0.001196+0.001163}=\sqrt{0.002359}=0.049$

Then, we can calculate the z-statistic as:

$z=\dfrac{p_d-(\pi_1-\pi_2)}{s_{p1-p2}}=\dfrac{-0.014-0}{0.049}=\dfrac{-0.014}{0.049}=-0.29$

This test is a two-tailed test, so the P-value for this test is calculated as (using a z-table):

$\text{P-value}=2\cdot P(z$

As the P-value (0.771) is bigger than the significance level (0.1), the effect is not significant.

The null hypothesis failed to be rejected.

There is not enough evidence to support the claim that the return rate is different for the Plain cover and the Skydiver cover.

8 0

3 years ago

Find the value of x so that the function has the given value. q(x)=1/2x-3; q(x)=-4

Darya [45]

Answer:-2

explanation:

substitute - 4 into q(x)

$- 4 = \frac{1}{2} x - 3$

Add three on both sides

$- 1 = \frac{1}{2} x$

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$\frac{2}{1}$

$- 2 = x$

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3 years ago

How long would it take sound waves traveling through air that is 68f to travel 1372 meters.

HACTEHA [7]

Answer:6 seconds

Step-by-step explanation:

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3 years ago

As a percentage $9.00 is equal to ? of $30.00

solmaris [256]

Answer:

30%

Step-by-step explanation:

Method 1-

Divide 9 by 9/30. You get 30. This is the percent that you need!

Method 2-

You can also simplify 9/30 down to 3/10. You just multiply this by 10 on both sides. This makes 30/100, or 30%

7 0

4 years ago

Read 2 more answers