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zavuch27 [327]
3 years ago
6

PLEASE HELP THIS IS THE LAST QUESTION!!

Mathematics
1 answer:
barxatty [35]3 years ago
5 0
The first step is to set the whole equation equal to zero. 
x³-3x²-2x+6=0
then solve for x
x=3, √2,-√2
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Several years​ ago, 39​% of parents who had children in grades​ K-12 were satisfied with the quality of education the students r
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
Hurrryy!!!<br> im on a timerrr
docker41 [41]

Answer:

3rd one

Step-by-step explanation:

12

5 0
2 years ago
Which expressions equals 9^3 sqrt 10
matrenka [14]
5^3 Sartre 10 + 4^3 sqrt 10
5 0
3 years ago
If -48 =6 (a), then a = ______
sleet_krkn [62]

Answer:

a = -8

Step-by-step explanation:

-48 = 6(a)

divide both sides by 6

-8 = a

7 0
2 years ago
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Daltons dad rode 1 kilometer north 2 kilometers west 1 kilometer south and 2 kilometers east. Dalton rode the same path 5 times
Fynjy0 [20]

Answer:

Dalton didn't ride any kilometer farther since he keeps threading in the same path as that of his father.

Step-by-step explanation:

If Dalton's dad rode 1 kilometer north, 2 kilometers west 1 kilometer south and 2 kilometers east, then he has been moving in a rectangular path.

If Dalton rode in the same path 5times, then Dalton's has not move farther than his dad since he is still moving in the same rectangular path. He is only expending more energy.

Their final destination will still be the same for both of them no matter how many times Dalton keeps threading in the same path.

3 0
3 years ago
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