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Kristy makes 5$ per hour babysitting and 12$ per hour giving music lessons. One weekend, she worked a total of 18 hours and made $139.00. How many hours did she spend babysitting? Write your answer in
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Kristy makes 5$ per hour babysitting and 12$ per hour giving music lessons. One weekend, she worked a total of 18 hours and made $139.00. How many hours did she spend babysitting? Write your answer in complete sentences.

User Gianluca Paris
by
8.8k points

1 Answer

4 votes
Let Karen works x hours baby sitting
So, she worked (18-x) hours giving music lessons
So,
According to question
5x + 12(18-x)=139
This gives
7*x=77
x=11
So,
Karen worked 11 hours baby sitting and (18-11)=7 hours giving music lessons
User Ccjensen
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7.6k points
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