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vladimir1956 [14]
4 years ago
12

Mary's sink was clogged, so she called a plumber. The plumber charges a service fee of $50 as well as $25 for each hour he worke

d. If mary paid $135.50, write an EQUATION to find the number of hours, h, that the plumber worked.
Mathematics
1 answer:
Katen [24]4 years ago
6 0

Answer: The plumber worked 3.42 hours

Step-by-step explanation:

25h+50=135.50 (minus 50 to both sides)

25h=85.50 (divide 25 to both sides)

h=3.42

Check:

25(3.42)+50=135.50

85.50+50=135.50

135.50=135.50

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Artemon [7]
<h3>Answer: Choice B. x = 4 and x = 3</h3>

Work Shown:

x^2 - 7x = -12

x^2 - 7x + 12 = 0

(x - 3)(x - 4) = 0 ... see note below

x - 3 = 0 or x - 4 = 0

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Note: we're looking for two numbers that multiply to 12 and add to -7. Those two numbers are -3 and -4, so that's where the factorization (x-3)(x-4) comes in. After this step, you set each factor equal to zero and solve for x.

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