Please help me I will give you extra points and whoever the first one to answer I mark you with the brain thing. 8

C

Step-by-step explanation:

The rate of charge is how often you are charged something.  If x represents miles than every ? miles you are charged 2.5. The 3 at the end is the y intercept or the point where you start so no matter how many miles you go you automatically owe 3 dollars

b

step-by-step explanation:

a difference is the result of subtraction. while each of these expressions has subtraction in it, a difference will be the result when subtraction is the last operation applied in the order of operations for the expression. this means subtraction must be outside of the parenthesis. only b has this.

the answer is 31.27mph