I need help with #10 in the photo. It is a question on arithmetic sequences in pre-calculus math.

-7/8

step-by-step explanation:

instead of subtracting you add the -6/8 and -1/8

all you should have to do is insert 1 where the c is, representing that one car is sold.

f(c) = 250c + 500

f(1) = 250(1) + 500

f(1) = 250 + 500

f(1) = 750

he earns $750 for each car sold.

hope this you! have a happy , here's a turkey!