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Matt charges $9 per hour to babysit. He babysat Friday night for five hours and then he babysat again on Saturday. He earned a total of $99. For how many hours did Matt babysit on Saturday?

Answer :

Final answer:

Matt, who charges $9/hour for babysitting, worked for 5 hours on Friday and earned $45. His total earnings for both Friday and Saturday was $99. Subtracting his Friday earnings from this total for algebraic problem solving, we find he earned $54 on Saturday. Dividing his Saturday earnings by his hourly rate, we find he worked for 6 hours on Saturday.

Explanation:

We know that Matt charges $9 per hour to babysit. On Friday, he babysat for 5 hours, earning him 5 x $9 = $45. We also know that in total, over Friday and Saturday, he earned $99. So, to find out how much Matt earned on Saturday, we subtract what he earned on Friday from his total earnings. Therefore, $99 - $45 = $54.

Now we want to know the number of hours Matt worked on Saturday. Since Matt charges $9 per hour, we divide his earnings on Saturday by his hourly rate. Therefore, $54 : $9 = 6 hours. So, Matt babysat for 6 hours on Saturday.

Learn more about Algebraic Problem Solving here:

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