Question

Question #2f2a5

Answer 1

So the unit cost (rate) of DVD's is $15

Explanation:

Using ratio in fraction format we have:

`" "("cost")/("DVD count") -> 75/5`

But we need 1 DVD so we need to change the 5 into 1.

`" "("cost")/("DVD count") ->75/5-=(75-:5)/(5-:5) = 15/1`

So the unit cost of DVD's is $15