Question

In order to aerate and laser-grade a baseball field, a contractor charges $350, plus $25 per hour for a job. The equation c=25h+350 describes the cost, c for a job that takes h hours.a. Rewrite the equation to isolate h.b. If a job costs $950, how many hours did it take?I’ve already solved part a I just need help with part b

Answer 1

According to the given equation, we need to solve it for h:

$\begin{gathered} c=25h+350 \\ c-350=25h \\ h=\frac{c-350}{25} \end{gathered}$

To find how many hours it took for a job that costs $950, replace c for this value and find h:

$\begin{gathered} h=\frac{950-350}{25} \\ h=\frac{600}{25} \\ h=24 \end{gathered}$

It took 24 hours to do the job.