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1 year ago

Someone help me on question 10 please!

Mathematics

1 answer:

Crazy boy [7]1 year ago

7 0

Answer:

Step-by-step explanation:

500÷9=55.56miles/h (correct to 3 decimal places)

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A line has this equation: y = -2x-5 Write an equation for the parallel line that goes through (-3,-5).

zhuklara [117]

Answer:

Step-by-step explanation:

y + 5 = -2(x + 3)

y + 5 = -2x - 6

y = -2x - 11

3 0

2 years ago

8/10 is iqual to 4/5

yan [13]

Yes, that is correct because if you want to reduce it you divide 8 by 2 and 10 by 2 and you get 4/5

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3 years ago

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Which table represents a linear function?

Andrew [12]

Answer:

The first table is the only table representing a linear function.

Step-by-step explanation:

" You can tell if a table is linear by looking at how X and Y change. If, as X increases by 1, Y increases by a constant rate, then a table is linear. You can find the constant rate by finding the first difference. This table is linear."

P.S.

( thanks to G00GLE for the anwers, hat's off to the internet :^)

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2 years ago

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B2≤4 What is the solution to the inequality? b≥8 b≤8 b≤2 b≥2

Allisa [31]

The solution is the third one:
b≤2

8 0

3 years ago

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A recent study examined hearing loss data for 1981 U.S. teenagers. In this sample, 369 were found to have some level of hearing

ruslelena [56]

Answer:

There is no enough evidence to support the claim that the proportion of US teens that have some level of hearing loss differs from 20%.

P-value=0.12

Step-by-step explanation:

We have to perform a test of hypothesis on the proportion.

The claim is that the proportion of US teens that have some level of hearing loss differs from 20%.

Then, the null and alternative hypothesis are:

$H_0: \pi=0.20\\\\H_a:\pi\neq0.20$

The significance level is assumed to be 0.05.

The sample, of size n=1981, has 369 positive cases. Then, the proportion is:

$p=X/n=369/1981=0.186$

The standard error of the proportion is:

$\sigma_p=\sqrt{\dfrac{\pi(1-\pi)}{n}}=\sqrt{\dfrac{0.2*0.8}{1981}}=\sqrt{ 0.000081 }= 0.009$

Now, we can calculate the statistic z:

$z=\dfrac{p-\pi+0.5/n}{\sigma_p}=\dfrac{0.186-0.20+0.5/1981}{0.009}=\dfrac{-0.014}{0.009}=-1.556$

The P-value for this two-tailed test is:

$P-value=2*P(z$

The P-value is below the significance level, so the effect is not significant. The null hypothesis failed to be rejected.

There is no enough evidence to support the claim that the proportion of US teens that have some level of hearing loss differs from 20%.

7 0

2 years ago