Sam earns $10 an hour on Math tutoring. For the first month, he earned $200; and for the second month, he earned $150 more than the first month. How many hours did he spend on tutoring for two months?
Use reasoning to answer the following question.
55
For the second month, Sam earned $200 + $150 = $350.

So, he earned a total of $200 + $350 = $550 for the first two months.

Therefore, he spent $550 / $10 = 55 hours on math tutoring for the first two months.

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The answer: 55