The function c(x)=0.56+50 represents the cost (in dollars) of a one-day truck rental when the truck is driven x miles, what is the truck rental cost when you drive 140 miles?

So, when we drive 140 miles, all we have to do is plug in 140 for X.

a. is correct

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.