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6 June, 20:24

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.

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  1. 6 June, 20:40
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    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
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