Question

A box of 6 golf balls cost 7.32. At the rate,how much will a box of 15 golf balls cost

Answer 1

$18.30

Explanation:

First, you can figure out the cost per golf ball by dividing the price by the number of golf balls. If 6 balls = 7.32, then 1 ball = 7.32/6, or 1.22. Now you can multiply this by the number of balls in the box to find out the price: 1.22 * 15 = 18.30.

Another way to solve this is to set up a ratio of balls / price:

(x is the unknown price)

`(6)/(7.32) =(15)/(x)`

Now, cross-multiplying, you find that 6x = 7.32 * 15, or 6x = 109.8. Dividing both sides by 6, you get x=18.30.