Plzzzzzzzzzzz help me!!!

Mathematics

1 answer:

Alisiya [41]3 years ago

4 0

Answer:

Step-by-step explanation:

-5a + 5b - 5

18xy - 6y

8x - 4y

-12d + 9e - 15

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If LaTeX: z_{obt}z o b t= +2.21, do you reject LaTeX: H_0H 0 or fail to reject LaTeX: H_0H 0 using a one-tailed test in the uppe

professor190 [17]

Answer:

Reject the null hypothesis

Step-by-step explanation:

From the question we are told that

The test statistic is $z_{obt} = +2.21$

The level of significance is $\alpha = 0.05$

Given that this a one tailed in the upper tail then from the z table the area under the normal curve to the right corresponding to $z_{obt} = +2.21$ is

$P( Z > 2.21) = 0.013553$

So the p-value is

$p-value = P( Z > 2.21) = 0.013553$

From the values obtained we see that $p-value < \alpha$ hence

The decision rule

Reject the null hypothesis

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3 years ago

Perpendicular lines , If the green line is 3 over 4 what is the red line NEED answers

sergey [27]

-2 over 3
there is the answer

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3 years ago

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Darron uses a family recipe to make hamburgers. If he plans on using 1 1/3 cups of bread crumbs, about how many pounds of hambur

Alborosie

In order to find the answer for this, we need to use proportions and cross multiply. Given that 3/4 of bread crumbs yields 3 hamburgers, and he plans on using 1 and 1/3 cup of bread crumbs, it will look like this: 3/4 over 3 : 4/3 over ?. So we cross multiply 3 by 4/3 and we get 4. Then divide 4 by 3/4 and we get 16/3 or 5 and 1/3. Therefore, the pounds of burgers that he needs to use is 5 and 1/3 pounds. Hope this helps.

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3 years ago

Casey has 5/6 left of a section of sidewalk to clean. If he can clean 5/18 of a section in 1 minute, how long will it take him t

GaryK [48]

Answer:

Casey will take 3 minutes to clean $\frac{5}{6}$ part of the section.