Question

@SKULLPATROL

Answer 1

http://prntscr.com/d057li

Answer 2

Any ideas?

Answer 3

Recall: $$\huge cost = \text{number of items} \times \text{price per item}$$

Answer 4

The price per book is $8/book.

Answer 5

How many $8 books does he have to sell to make $400?

Answer 6

A?

Answer 7

nope, try again please :-)

Answer 8

It has to be C?

Answer 9

Let x = the number of books.

Answer 10

@brooke..help00 stop guessing

Answer 11

Not C.

Try to use the the formula above please...

Answer 12

the question ask the number of books so automatically it has to be B or D the maximum of 100

Answer 13

like demonstrated by @skullpatrol
you need $400 and $8 per book how many books could you get?

Answer 14

$400
------
$8/book

Answer 15

See how the units of $ cancel out and you are left with number of books?

Answer 16

@brooke..help00 are you here? what is 400/8 ?

Answer 17

$$\Huge cost=\text{number of items} × \text{price per item}$$

$$\Huge 400 =\text{number of books} × \text{8 per book}$$