15. john works for the local used car dealership. his weekly salary is $375 plus a commission based on the number of cars that he sells. his commission is $80 per car for the first 7 cars sold each week. for any car over 7 sold each week, john earns a commission of $180 per car. complete the piecewise function that can be used to calculate john's weekly salary, s, when he sells t cars each week. note: use the letter t as your variable

S = 935 when t ≤ 7

S = (180t - 325) when t > 7

Step-by-step explanation:

John's weekly salary = $375 + commission on number of cars he sell

Commission for the first seven cars sold = $80 per car

Commission above 7 cars = $180 per car

If John sells t cars each week then commission earned by John

= 80×7 + 180(t - 7)

So the salary for week = 375 + commission

S = 375 + 560 + 180(t - 7)

S = 935 + 180(t - 7)

S = 935 when t ≤ 7

     (180t - 325) when t > 7

i need the options

step-by-step explanation: