You burn 20 calories per minute biking for x minutes and 10 calories per minute walking for y minutes. You spend a total of 80 minutes biking and walking and burn 1140 calories. a. Write a system of equations

You burn 20 calories per minute biking for x minutes and 10 calories per minute walking for y

minutes. You spend a total of 80 minutes biking and walking and burn 1140 calories.
a. Write a system of equations to determine how much time you spend on each exercise.
b. How many minutes did you spend biking?

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You burn 20 calories per minute biking for x minutes and 10 calories per minute walking for y minutes. You spend a total of 80 minutes biking and walking and burn 1140 calories.…

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