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Karen makes $6 per hour baby-sitting and $13 per hour giving music lessons. One
weekend, she worked a total of 8 hours and made $55. How many hours did she spend
baby-sitting?
a. 9
b. 1
C. 2
D.7

Respuesta :

The total hours that Karen spent baby-sitting on the weekend is 7 hours.

What are the equations that represent the question?

a + b = 8 hours equation 1

6a + 13b = 55 equation 2

Where:

  • a = hours spent baby-sitting
  • b = hours spent giving music lessons

How many hours was spent babysitting?

Multiply equation 1 by 13

13a + 13b = 104 equation 3

Subtract equation 2 from equation 3

7a = 49

a = 7 hours

To learn more about simultaneous equations, please check: https://brainly.com/question/10049376

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