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2 years ago

A bookstore costs $105 a day to keep open, and it spends $12 for each book

Mathematics

1 answer:

Alex2 years ago

4 0

After selling 35 books, the store will break-even.

Step-by-step explanation:

Given,

Cost required per day to keep store open = $105

Amount spent on each book = $12

Let,

n be the number of books.

Total costs = 12n + 105

Selling price of each book = $15

Total revenue = 15n

For braking even;

Costs = Revenue

$12n+105=15n\\105=15n-12n\\105=3n\\3n=105$

Dividing both sides by 3

$\frac{3n}{3}=\frac{105}{3}\\n=35$

After selling 35 books, the store will break-even.

Keywords: revenue, cost, division

Learn more about division at:

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Angle ABD is the external angle of ∆BCD that is the sum of the remote interior angles BCD and BDC. Hence ∠ABD = 48° +50° = 98°.

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