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MariettaO [177]
3 years ago
7

An electrical company uses the function f(h) = 15h + 75 to calculate the total repair bill, f(h), for h number of hours worked.

Find h if f(h) = $225.
Mathematics
2 answers:
kap26 [50]3 years ago
8 0
$225 = 15h + 75
150 = 15h
h = 10

The answer is 10. Hope this helps :).
Ugo [173]3 years ago
7 0

Answer:  The required value of h is 10.

Step-by-step explanation:  Given that an electrical company uses the following function to calculate the total repair bill f(h) for h number of hours worked :

f(h)=15h+75~~~~~~~~~~~~~~~~~~~~~~~~~~~~(i)

We are to find the value of h if f(h) = $225.

To find the required value of h, we need to substitute the value of f(h) in equation (i) as follows :

f(h)=15h+75\\\\\Rightarrow 225=15h+75\\\\\Rightarrow 15h=225-75\\\\\Rightarrow 15h=150\\\\\Rightarrow h=\dfrac{225}{15}\\\\\Rightarrow h=10.

Thus, the required value of h is 10.

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8 0
3 years ago
Can i get help on these
JulsSmile [24]

Answer:

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a) The parenthesis indicate multiplication.

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c) They already have common denominators, all that's left is to do \frac{-7 -2}{3} = \frac{-9}{3} = -3

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Good luck!

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