Asked by duran

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?

Round answers to the nearest whole number.

___thirty second commercials
___sixty second commercials
Answered by anonymous
30x+60y=360
x+y=9
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