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.
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
