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2 years ago

I need help with math homework

1 answer:

6 0

Answer:

x is going to be 38 and have a great day

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Usimov [2.4K]

$\sqrt{4x}+5+1=0\\
\sqrt{4x}=-6\\
x\in \emptyset$

4 0

2 years ago

Nesterboy [21]

Answer:

52 sq un

Step-by-step explanation:

8 0

2 years ago

BaLLatris [955]

<h2>Answer with explanation:</h2>

Let p be the population proportion of parents who had children in grades K-12 were satisfied with the quality of education the students receive.

Given : Several years ago, 39% of parents who had children in grades K-12 were satisfied with the quality of education the students receive.

Set hypothesis to test :

$H_0: p=0.39\\\\H_a :p\neq0.39$

Sample size : n= 1055

Sample proportion : $\hat{p}=\dfrac{466}{1055}=0.441706161137\approx0.44$

Critical value for 95% confidence : $z_{\alpha/2}=1.96$

Confidence interval : $\hat{p}\pm z_{\alpha/2}\sqrt{\dfrac{p(1-p)}{n}}$

$0.44\pm (1.96)\sqrt{\dfrac{0.39(1-0.39)}{1055}}\\\\0.44\pm0.0299536805135\\\\0.44\pm0.03\\\\=(0.44-0.03, 0.44+0.03)\\\\=(0.41,\ 0.47)$

Since , Confidence interval does not contain 0.39.

It means we reject the null hypothesis.

We conclude that 95% confidence interval represents evidence that parents' attitudes toward the quality of education have changed.

8 0

3 years ago

jonny [76]

I believe the answer is b

8 0

2 years ago

Sedbober [7]

6 - (-6)
This is because two negatives make a positive, so you’ll be adding 6+6 which equals to 12 not 0

3 0

3 years ago