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wariber [46]
3 years ago
8

Please answer thoroughly

Mathematics
1 answer:
aleksklad [387]3 years ago
7 0

Answer:

Part A: 2k(2c2+5(2)-8c-20)

Part B: sorry i don't know how to do this part

Step-by-step explanation:

Part A, you divide each number by 2 first so you get a simplified version of each number. Then, you will quickly realize that the varible k is similar in all of the numbers then you remove that and put it with the 2 outside the (). Hope you understood my explination.

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A recent study estimated that 68% of US adults enjoy reading a book while relaxing. How many adults are required
Leno4ka [110]

Answer:

Step-by-step explanation:

236, did on edge

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3 years ago
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Step by Step explanation:

4 0
3 years ago
A poll was conducted by a home mortgage company regarding home ownership in the United States. The company polled 1,488 American
____ [38]

If the sample size is 1488 and confidence interval of 99% then the margin of error is 0.03088.

Given sample size of 1488, percentage of those polled own a home be 69% and confidence level be 99%.

We are required to find the approximate margin of error.

Margin of error is the difference between calculated values and real values.

n=1488

p=0.69

Margin of error=z*\sqrt{p(1-p)/n}

Z score when confidence level is 99%=2.576.

Margin of error=2.576*\sqrt{0.69(1-0.69)/1488}

=2.576*\sqrt{(0.69*0.31)/1488}

=2.576*\sqrt{0.2139/1488}

=2.576*\sqrt{0.0001437}

=2.576*0.01198

=0.03088

Hence if the sample size is 1488 and confidence interval of 99% then the margin of error is 0.03088.

Learn more about margin of error at brainly.com/question/10218601

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3 0
2 years ago
Two numbers, 3 and a, have a geometric mean of 9. Find the value of a.
Ket [755]
The geometric mean of two numbers x and y is √(xy).

So, if the geometric mean of 3 and a is 9 =>

9 = √(3a)

=> 9^2 = 3a

=> a = 9^2 / 3

a = 81 / 3

a = 27

Answer: the value of a is 27.
4 0
2 years ago
5 Divided by (1200+700)
solmaris [256]

Answer:

380

Step-by-step explanation:

1200 + 700 = 1900/5 = 380

7 0
2 years ago
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