Question

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.

Answer 1

$225 = 15h + 75
150 = 15h
h = 10

The answer is 10. Hope this helps :).

Answer 2

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.