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Answer :
Final answer:
The correct equation representing the charges for a plumber if his service charge is $70 and he charges $30 per hour, and the total bill was $172, is '70 + 30h = 172'.
Explanation:
The question is asking to find an equation that represents a plumber's charges. The plumber charges a $70 service fee plus $30 for each hour of work (represented by 'h'). Finally, the total amount is given as $172.
This kind of fee structure is typically modeled with a linear equation where the fixed fee is the y-intercept and the hourly charge is the slope. Therefore, the correct equation is 70 + 30h = 172. This means that the plumber's service charge of $70 plus $30 for each hour of work is equal to the total bill of $172.
Learn more about Linear Equations here:
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