Jack is a car salesman who
works strictly on commission.
for every car he sells, he
earns a 2% commission. cars
sell for $35,000 each.
shade in the number of cars
jack needs to sell in order to
reach his target income of
$5,000 for the end of the
month.

answer:

he must sell a minimum of 8 cars and will get $5600

step-by-step explanation:

if he sells only seven he will get $4900 which is below his target.

and as you cant sell a frction of a car he must sell 8 cars.

the revenue of the fitness center, y, is the product of two factors: the number of members and the fee paid by each member. there are 320 members now, but number of members goes down by 10 for each $5 increase in fees, so if x is the number of $5 price increases then members is equal to (320 - 10x). since the fee is currently $45, and the fee increases by $5 for every price bump x, the fee is given by (45 + 5x). so, revenue y is given by y = (320 - 10x)(45 + 5x).