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3 years ago

3.

Mathematics

1 answer:

AlladinOne [14]3 years ago

8 0

Answer:

A= 6-10= -6

A= -4= -6

B= -4 -7= -1

B= -11= -1

C= 8 -24= -16

C= -16=-16

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-24n^4+90n^2-50 / 2n^2-5

horrorfan [7]

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4 years ago

The students at Joey's school voted for a new school color. 90 students voted for red and the other 10 students voted for blue.

pickupchik [31]

90% of the student voted for red and only 10% voted for blue.

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3 years ago

A Gallup Poll in July 2015 found that 26% of the 675 coffee drinkers in the sample said they were addicted to coffee. Gallup ann

emmasim [6.3K]

Answer:

The 95% confidence interval for the percent of all coffee drinkers who would say they are addicted to coffee is between 21% and 31%.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

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The margin of error is:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

A confidence interval has two bounds, the lower and the upper

Lower bound:

$\pi - M$

Upper bound:

$\pi + M$

In this problem, we have that:

$\pi = 0.26, M = 0.05$

Lower bound:

$\pi - M = 0.26 - 0.05 = 0.21$

Upper bound:

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The 95% confidence interval for the percent of all coffee drinkers who would say they are addicted to coffee is between 21% and 31%.

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3 years ago

Mason works h hours each day during the 5 day workweek. He also works 5 hours on the weekends. Write two equivalent expressions

kobusy [5.1K]

Answer:

5h+5

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Step-by-step explanation:

Equivalent expressions are the ones that look different but are the same. As the statement says that mason works h number of hours during the 5 day week and 5 hours on the weekend, you can write the following expression:

5h+5

h= number of hours Mason works

Then, you can find the common factor to get an equivalent expression:

5(h+1)

According to this, the equivalent expressions are:

5h+5

5(h+1)

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3 years ago

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