Which equation could be used to solve y 2+7y=18 by factoring?

y(y + 7) = 18
(y + 2)(y + 9) = 0
(y + 9)(y - 2) = 0

There are 45 questions on your math exam. you answered 810 of them correctly. how many questions did you answer correctly?

Rosa and lisa ade practicing free throws on the basketball court. so far,rosa has made one-and a-half times as many free throws as lisa.what is the unit ratio of rosa's free throws to lisa's free throws?

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?