Roscoe must play 9 commercials during his 1-hr radio show. Each commercial is either thirty seconds or sixty seconds long. If the total commercial time during that hour is 6 minutes, how many commercials of each type does Roscoe play?

Question

Round answers to the nearest whole number.

___thirty second commercials
___sixty second commercials

Answer 1

30x+60y=360
x+y=9