Posted by Manda on Friday, February 29, 2008 at 5:32pm.
Megan exercises every morning for 40 minutes. She does a combination of step aerobics, which burns about 11 calories per minute, and stretching, which burns about 4 calories per minute. Her goal is to burn 335 calories during her routine. Write a system of equations that represents Megan's morning workout.

Math  drwls, Friday, February 29, 2008 at 7:01pm
x = minutes of aerobics
y = minutes of stretching
x + y = 40
11x + 4y = 335
It is possible to solve those two equations for both x and y, but they are only are asking for the equations.
In case you are curious, x = 25
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