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4 years ago

Give right answer quick!!!!

Mathematics

1 answer:

Troyanec [42]4 years ago

8 0

area of door = 8 x 3 = 24 square feet

24 x 6 = 144

it will cost $144

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Help! Due tomorrow!! "Yvonne owes her sister $25. Michael's checking account balance is -$20. Write and inequality to compare th

trasher [3.6K]

I would probably say - 25<-20 Because Yvone is 25$ in debt, and Michael is $20 in debt. - 20 is larger than - 25.

5 0

3 years ago

Read 2 more answers

What is an explicit formula for "a one-time joining fee of $3.00 and $0.08 per message"?

satela [25.4K]

(3+.08X)=FEES
X= MASSAGES

4 0

3 years ago

Help me pls the quration is hard

Vanyuwa [196]

Answer:

see explanation

Step-by-step explanation:

The 4 sides of a rhombus are congruent.

(i)

2y + x - 4 = 2x - y ( subtract 2x - y from both sides )

3y - x - 4 = 0 ( add 4 to both sides )

3y - x = 4 → (1)

and

$\frac{4x-3y+5}{2}$ = 2x - y ( multiply both sides by 2 to clear the fraction )

4x - 3y + 5 = 4x - 2y ( subtract 4x - 2y from both sides )

- y + 5 = 0 ( subtract 5 from both sides )

- y = - 5 ( multiply both sides by - 1 )

y = 5

substitute y = 5 into (1)

3(5) - x = 4

15 - x = 4 ( subtract 15 from both sides )

- x = - 11 ( multiply both sides by - 1 )

x = 11

(ii)

then

2x - y = 2(11) - 5 = 22 - 5 = 17

perimeter = 4 × 17 = 68 cm

8 0

2 years ago

Given the equation A=250(1.1)t, you can determine that the interest is compounded annually and the interest rate is 10%. Suppose

ehidna [41]

Answer:

76%

Step-by-step explanation:

7 0

3 years ago

The US Census reported that it takes workers an average of 28 minutes to get home from work with standard deviation 5 minutes. A

xz_007 [3.2K]

Using the z-distribution, as we have the standard deviation for the population, to test the hypothesis, it is found that this is evidence that workers in the large city take longer than 28 minutes to get home from work.

<h3>What are the hypothesis tested?</h3>

At the null hypothesis, it is tested if the mean time is of 28 minutes, that is:

$H_0: \mu = 28$

At the alternative hypothesis, it is tested if the mean time is greater than 28 minutes, that is:

$H_1: \mu > 28$ .

<h3>What is the test statistic?</h3>

The test statistic is given by:

$z = \frac{\overline{x} - \mu}{\frac{\sigma}{\sqrt{n}}}$

The parameters are:

$\overline{x}$ is the sample mean.

$\mu$ is the value tested at the null hypothesis.

$\sigma$ is the standard deviation of the sample.

n is the sample size.

In this problem, the values of the parameters are given by:

$\overline{x} = 32, \mu = 28, \sigma = 5, n = 10$

Hence:

$z = \frac{\overline{x} - \mu}{\frac{\sigma}{\sqrt{n}}}$

$z = \frac{32 - 28}{\frac{5}{\sqrt{10}}}$

$z = 2.53$

<h3>What is the decision?</h3>

Considering that we have a <em>right-tailed test</em>, as we are testing if the mean is greater than a value, with a standard <em>significance level of 0.05</em>, the critical value is of $z^\ast = 1.645$ .

Since the test statistic is greater than the critical value, it is found that this is evidence that workers in the large city take longer than 28 minutes to get home from work.

To learn more about the z-distribution, you can check brainly.com/question/26454209

4 0

2 years ago