You and your friend each start a car-washing service.
you spend
$25
$25
on supplies and charge
$10
$10
per car.
your friend spends
$55
$55
on supplies and charges
$13
$13
per car.

how many cars do you have to wash to earn the same amount of money as your friend?

6 on both sides and twelve on the top and the bottom

step-by-step explanation:

step-by-step explanation:

compare

definitely a. the others have almost all data points on one side of the line.

step-by-step explanation:

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.