How much was his raise (to the nearest cent)?

Question

Mike works in a toy store. One week, he worked 38 hours and made $220. The next week, he received a raise, so when he worked 30 hours he made $180. How much was his raise (to the nearest cent)?

Answer 1

220/38 + x all times 30 = 180

(220 +38x)30 = 38(180)

220 +38x = 38(180)/30 = 38(6) = 224

38x = 224-220 = 4

x = 4/38 = 2/19 = about .1053 = about 11 cents per hour raise

he was making about $5.80 an hour. with the raise he makes about $5.91 an hour

5.91x30 = about $180