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3 years ago

How do you solve this?

Mathematics

2 answers:

Afina-wow [57]3 years ago

5 0

C is equal to (30 x t) + 40
C = 30t + 40
we are given that C = 240
280=30t + 40
solve for t
t = 8 hrs

vovangra [49]3 years ago

4 0

a) C = 40 + 30t

b) 280 = 40 + 30t

30t = 240

t = 8

The plumber worked 8 hours

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