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2 years ago

13

you can read an average of 40 pages per night. if you have already read 120 pages, how many more nights will it take to read a 5

52 page book?

1 answer:

gtnhenbr [62]2 years ago

4 0

Answer:

10.8

Step-by-step explanation:

first, you subtract 552 and 120 to find the remaining of pages there is left.

552-120=432

now, since we know how much is left, all we have to do is divide it with 40.

432÷40=10.8

so, it will take 10.8 days to finish reading the book.

*edit

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Solve<br><img src="https://tex.z-dn.net/?f=%5Csf%20%5Cdfrac%7B1%7D%7Bp%7D%20%2B%20%5Cdfrac%7B1%7D%7Bq%7D%20%2B%20%5Cdfrac%7B1%7D

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$\displaystyle \begin{cases} \displaystyle {x} _{1} = - p \\ \displaystyle x _{2} = - q \end{cases}$

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we would like to solve the following equation for x:

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$\displaystyle \frac{1}{p} + \frac{1}{q} = \frac{x - (q + p + x)}{x(p + q + x)}$

get rid of only x:

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simplify addition of the left hand side:

$\displaystyle \frac{q + p}{pq} = \frac{ - (q + p )}{x(p + q + x)}$

divide both sides by q+p Which yields:

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rearrange it to standard form:

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