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lisabon 2012 [21]
4 years ago
13

a moving company charges $800 plus $16 per hour. Another moving company charges $720 plus $21 per hour. how many long is a job t

hat costs the same no matter which company is used?
Mathematics
1 answer:
Alja [10]4 years ago
5 0

It is given in the question that

A moving company charges $800 plus $16 per hour. Another moving company charges $720 plus $21 per hour.

And let the number of hours be h hours.

So for the two companies, the equation of the cost are

C = 16h + 800, C = 21h +720

According to question

16h +800=21h +720
\\
800-720=21h -16h
\\
80 = 5h
\\
h=16 hours

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