Ben’s general store is selling yarn for $.04 a foot. How many feet can you buy for $0.52?

Solution:

Consider x as the amount of feet

So the function f(x) = 0.04x as the yarn is $.04 a foot…. (1)

Now you have to spend $0.52 on the yarn 

So f(x) = 0.52 …. (2)

By equating both

0.04x = 0.52

Dividing both sides by 0.04

x = 0.52/0.04

x = 13

Therefore, you can buy 13 feet of yarn for $0.52.

Ben’s general store is selling yarn for $.04 a foot. How many feet can you buy for $0.52?

Summary:

Ben’s general store is selling yarn for $.04 a foot. You can buy 13 feet of yarn for $0.52.