Answer :

The answer is B, because 85 would be the flat rate plus 30x per hour and it would have to less than or equal to 250.
Answer is A: 30x-85≤250

Explanation: $250 minus $85 ONE TIME charge = $165 total dollars remaining

STEP 2: 165 / 30 finds the number of hours plumber can work.
30x-85≤250

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