Question

Leah worked a total of 30 hours at two jobs last week. Her combined pay from the jobs was $240. She earned $9 per hour working at the movie theater and $6 per hour babysitting. How many hours did she spend babysitting? 10 hours babysitting O25 hours babysitting 20 hours babysitting 15 hours babysitting​

Answer 1

Explanation:

Total Hours = 30 h

Total Pay = $240

Work at movie theater = $9/h

Work at babysitting = $6/h

Tm = hrs work at movie theater

Tb = hrs work as babysitting

Total hours = Tm + Tb = 30

So,

Tm = 30 - Tb

Total pay = Tm * 9 + Tb * 6 = 240, substitute Tm

(30 -Tb) * 9 + Tb * 6 = 240, solve for Tb

270 - 9Tb + 6Tb = 240

270 - 3Tb = 240

3Tb = 270 - 240 = 30

Tb = 10

Tm = 30 - Tb = 30 - 10 = 20

Hours work at movie = 20 hrs

Hours work as babysitter = 10 hrs