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klio [65]
3 years ago
9

Rachel has already written 10 pages, and she expects to write 1 page for every additional hour spent writing. How many hours wil

l Rachel have to spend writing this week in order to have written a total of 27 pages?
Mathematics
1 answer:
vlada-n [284]3 years ago
4 0

Answer:

27?

Step-by-step explanation:

because 1 page per 1 hour leads up to 27 hours for 27 pages. Or if your not counting the 10 pages she has already written, she spent 17 hours.

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In a sale there is 25% off all prices. A chair costs £45 in the sale. How much was it before the sale?
garri49 [273]

Answer:

60 pounds

Step-by-step explanation:

Let the normal price be p.  The "25%-off" sale price is then 0.75p, and this 0.75p equals 45 pounds.  Dividing both sides by 0.75 results in p = 60 pounds.

3 0
2 years ago
The following data pairs represent the average temperature x (in degrees Fahrenheit) and electricity
elena55 [62]

Answer:

<u>The correct answer is C. r = 0 because is most likely the closest to the correlation coefficient of the data.</u>

Step-by-step explanation:

Using Excel, we captured the data provided for the 12 different homes for calculating the correlation coefficient manually, this way:

n = 12

∑x = 904

∑y = 2,169

∑xy = 167,532

∑x² = 69,552

∑y² = 404,615

r =  [n *∑xy  - (∑x * ∑y)]/[√(n * ∑x² - (∑x)²) * (n * ∑y²  - (∑y)²)]

Replacing with the real values, we have:

r = [12 * 167,532  - (904 * 2,169)]/[√(12 * 69,552 - 904²) * (12 * 404,615  - 2,169²)]

r = [2'010,384  -1'960,776]/[√(834,624 - 817,216) * (4'855,380  - 4'704,561]

r = 49,608/√17,408 * 150,819

r = 49,608/ 51'239.215

r = 0.00097

<u>The correct answer is C. r = 0 because is most likely the closest to the correlation coefficient of the data.</u>

4 0
2 years ago
Read 2 more answers
Can you plz help me plz
Harman [31]

Answer:b=16

Step-by-step explanation:trust me bro

6 0
3 years ago
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Is there a relationship between the different of the integers and the distance between them?
user100 [1]

Wait just a minute.  Hold up.  Hee haw. Whoa !

Coming down to Earth for just a second ... what in the world is
the "distance" between integers anyway !
7 0
3 years ago
Read 2 more answers
Pls look at this picture and answer
Pepsi [2]

Answer:

625

Step-by-step explanation:

7 0
2 years ago
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