Alawn care company charges a $10 trip fee plus $0.15 per square foot of x square feet of lawn for fertilization. which equation represents the relationship?

a) x = 0.10y + 15
b) y = 0.15x + 10
c) y = 10x + 0.15
d) x = 10y + 0.15

The wheels of a bicycle have a diameter of 70cm. how many meters will the bicycle travel if each wheel makes 50 revolutions

How many quarts of a 50% solution of acid must be added to 20 quarts of a 20% solution of acid in order to get a 40% solution of acid?

The john deere company has found that revenue,in dollars, from sales of heavy-duty tractors is a function of the unit price p, in dollars, that it charges. if therevenue r is r(p)= -1/2p^2 +1900pa)how much revenue will the company generate if they sell 700 tractors? b) how many tractors does the company want to sell to maximize the revenue?