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4 votes
4 votes
Karen makes 5 dollars per hour babysitting and 12 dollars per hour giving music lessons. One weekend, she worked a total of 18 hours and made 139 dollars. How many hours did she babysit that weekend

User Alois Heimer
by
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2 Answers

6 votes
6 votes
Music lessons: 7 hours x £12 = £84
Babysit: 11 hours x £5 = £55

£84 + £55 = £139

So she babysit for 11 hours on weekend.
User John Fricker
by
2.6k points
9 votes
9 votes

Answer:

15.06

Explanation:

Substituting this value into the first equation gives us b + 2.94 = 18, so b = 15.06 hours. Since Karen can only work whole hours, she must have worked 15 hours babysitting and 3 hours giving music lessons.

User Amarilys
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3.1k points