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2 years ago

Solve the system of equations by multiplying first. Enter the solution as an ordered pair.

Mathematics

2 answers:

saveliy_v [14]2 years ago

8 0

The answer is x=4, y=-2 and the ordered pair would be (4,-2) good luck

soldi70 [24.7K]2 years ago

7 0

Multiply the first equation by -3x for elimination. The answer is (4, -2) x,y

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Rosetta wants to estimate the percentage of people who rent their home. She surveys 250 individuals and finds that 48 rent their

Andreas93 [3]

Answer:

$0.192 - 1.645\sqrt{\frac{0.192(1-0.192)}{250}}=0.151$

$0.192 + 1.645\sqrt{\frac{0.192(1-0.192)}{250}}=0.233$

Step-by-step explanation:

Information given

$X= 48$ number of people who rent their home

$n= 250$ represent the sample size

$\hat p =\frac{48}{250}= 0.192$ represent the proportion of people who rent their home

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 90% of confidence, our significance level would be given by $\alpha=1-0.90=0.1$ and $\alpha/2 =0.05$ . And the critical value would be given by:

$z_{\alpha/2}=\pm 1.645$

The confidence interval for the mean is given by the following formula:

$\hat p \pm z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}$

If we replace the values obtained we got:

$0.192 - 1.645\sqrt{\frac{0.192(1-0.192)}{250}}=0.151$

$0.192 + 1.645\sqrt{\frac{0.192(1-0.192)}{250}}=0.233$

3 0

2 years ago

Least to greatest !?

Bad White [126]

The lengths are $\frac{5}{6} \frac{5}{12} and \frac{1}{3}$
finding the LCM we get
$\frac{10,5,4}{12}$
arranging them
$\frac{1}{3} \frac{5}{12} and \frac{5}{6}$

6 0

2 years ago

What is the prime number ot 35,69,89,90

Paladinen [302]

The prime number will be 69 and 89

3 0

2 years ago

If Ill m, solve for x.<br> (4x - 7)<br> (7x-61)<br> X =

Mars2501 [29]

4x-7=7x-61
-7=3x-61
54=3x
Answer
X=18

4 0

1 year ago