Week 7 DQ 2 Rudy must play 12 commercials

Week 7 DQ 2 Rudy must play 12 commercials - + = x y 12 + =...

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Rudy must play 12 commercials during his 1-hr radio show. Each commercial is either 30  sec or 60 sec long. If the total commercial time during that hour is 10 min, how many  commercials of each type does Rudy play?
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Unformatted text preview: + = x y 12 + = 30x 60y 600 =-x 12 y- + = 3012 y 60y 600-+ = 360 30y 60y 600 + = 360 30y 600 = 30y 240 = y 8 + = x y 12 + = x 8 12 = x 4 4 30 second commercials 8 1 minute commercials...
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