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3 years ago

10

Help me and I’ll show u my dump truck

1 answer:

ivolga24 [154]3 years ago

8 0

3rd one I think fhidbzjdh

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How are you supposed to find the slope of a line?

MArishka [77]

You have to find two definite points on the graph, i'll use (1,4) and (2,6) as an example

The slope formula is (y2-y1)/(x2-x1)

This means you have to subtract the first y value from the second divide it by the first x value subtracted from the second

In my example you have to do (6-4)/(2-1) to get 2/1, or 2

Hope this helps!

7 0

3 years ago

An Someone plz help me plz :(

zlopas [31]

Answer:

18

Step-by-step explanation:

original 3:4

now 18:24

Multiply by 6

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3 years ago

When someone donated 14 gallons of paint to DeAnza Elementary. The fifth grade decided to use it to paint murals. They split the

Oksanka [162]

Each class had 3.5 gallons of paint to paint with and 3 classes used 10.5 gallons of paint

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3 years ago

Intrest anyone help fffffffffff

Andrej [43]

Answer:

1200

Step-by-step explanation:

i=prt

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3 0

3 years ago

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

3 years ago