Mathematics, 26.10.2019 11:43 emokid7822
Anna burned 15 calories per minute running for x minutes and 10 calories per minute hiking for y minutes. she spent a total of 60 minutes running and hiking and burned 700 calories. the system of equations shown below can be used to determine how much time anna spent of each exercise.
15x + 10y =700
x + y = 60
what is the value of x, the minutes anna spent running?
a) 20
b) 40
c) 10
d) 30
Answers: 1
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Anna burned 15 calories per minute running for x minutes and 10 calories per minute hiking for y min...
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