Aschool typically sells 500 yearbookseach year for $50 each. the econmics class does a project and discovers that they can sell 100 more yearbooksfor every $5 decrease in price. the revenue for yearbooks is equalto the number of yearbooks sold times the price of the year book. let x represent the number of $5 decreases in price. if the expression that represents the revenue is written in the form r(x)=(500+ax)(50-bx). find the valuesof a and b.