Question

The cost of having a plumber spend h hr at your house if the plumber charges ​$30 for coming to the house and​ $x per hour for labor. The expression for the cost of the plumber coming to the house is how many dollars.

Answer 1

C = 30 + x * h

Explanation:

The total cost for the plumber is his initial fee plus the number of hours times the cost per hour

C = 30 + x * h

Answer 2

`C(h)=\$30+xh`

Explanation:

Let

C-----> the cost of having a plumber spend h hours at your house

h----> the number of hours

x----> the cost per hour of labor

we know that

The linear equation that represent the cost C is equal to

`C(h)=\$30+xh`

In this linear equation in the slope-intercept form (y=mx+b)

the slope is equal to
`m=x(\$)/(hour)`

the y-intercept b is equal to
`b=\$30` ---> charge for coming to the house