The thompson's need their garage door opener repaired. the table shows the service charge and hourly labor fees for two repair companies.
doors galore service charge is 40 and the hourly rate is 50
g& h charge is 60 and hourly rate is 40
write an eqation to represent the total cost y for x hours of labor by each repair company

All you need to do here is know where and how to plug in the numbers. In each equation, you'll have an initial fee, and an hourly fee, so your equation will be
y = i + hx, where i = the initial fee, and h = the hourly fee

So, after plugging them in, here's what you get:
Doors Galore: y = 40 + 50x
G&H: y = 60 + 40x

= (2*10) + (-3*-4) + 5                        (* means multiply)
= 20 + 12 + 5
= 37