Question

What value of n makes each statement true? Suppose regular gasoline costs $2.50 per gallon. You can purchase a car wash at the gas station for $3.
a. Write an equation in slope-intercept form for the total cost y of purchasing a car wash and x gallons of gasoline.

b. Find the cost of purchasing a car wash and 8 gallons of gasoline.

Answer 1

Answer:

a.  y = $3 + $2.50x,

b.  $23

Step-by-step explanation:

y is the total cost of x gallons of gasoline at $2.50/gallon.

a.  The total cost of one car wash ($23 each) plus x gallons of gas is:

a.  y = $3 + $2.50x

b.  The cost of a car wash and 8 gallons (x=8) is:

b.  y = $3 + $2.50*(8)

   y = $3 + $20

   y = $23