Can someone please help me with 8

Mathematics

2 answers:

OleMash [197]3 years ago

5 0

This is my work on the problem.

I hope this helps

Sholpan [36]3 years ago

4 0

A) Graham drove 31.75 miles in one hour.

My Work/Reasoning:
To find how much Graham drove in 1 hour, you divide the distance by time. 42 1/3 / 1 1/3
Then you convert the mixed fractions into improper fractions. 127/3 / 4/3
Finally, you solve the equation and learn that Graham drove 31.75 miles in one hour.

b) 4/127 hours

My Work/Reasoning:
In this case, you reverse the equation from (a). 1 1/3 / 42 1/3
Then you convert the mixed fractions into improper factions. 4/3 / 127/3
Finally, you solve the equation and learn that Graham takes 4/127 hours to drive one mile.

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A rectangle has vertices at these coordinates.

Ainat [17]

The coordinates of the fourth vertex are (0,0). I hope this helps!

5 0

3 years ago

Read 2 more answers

Suppose 229 subjects are treated with a drug that is used to treat pain and 52 of them develop nausea use a 0.01 significance le

kenny6666 [7]

Answer:

The null hypothesis is $H_o: p \leq 0.2$

The alternate hypothesis is $H_a: p > 0.2$

The pvalue of the test is 0.1515 > 0.01, which means that we do not reject the null hypothesis that 20% of less users develop nausea, that is, we have no sufficient evidence that this proportion is larger than 20%.

Step-by-step explanation:

Test the claim that more than 20% of users develop nausea

This means that the null hypothesis is that 20% or less of the users develop nausea, that is:

$H_o: p \leq 0.2$

And the alternate hypothesis is that more than 20% develop, so:

$H_a: p > 0.2$

The test statistic is:

$z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$