SOLUTION: each morning you do a combination of aerobics which burn 12 calories per minute and stretching which burns 4 calories per minute. your goal is to burn 416 calories during a 60 minu

Question 810901: each morning you do a combination of aerobics which burn 12 calories per minute and stretching which burns 4 calories per minute. your goal is to burn 416 calories during a 60 minute workout. How long should you spend on each exercise to burn 416 calories?
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
12a + 4s = 416
a + s = 60
a = 60 - s
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12a + 4s = 416
12(60 - s) + 4s = 416
720 - 12s + 4s = 416
304 = 8s
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s = 38 min
a = 22 min
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