Yo can you help me please? I'm tryna get by with ease. You don't got to be mean. My raps usually don't be clean. if you help me wit this question. you will be a real blessin. If you don't know the answer, then imma have a bad temper. XD Type the correct answer in each box. Use numerals instead of words. If necessary, use / for the fraction bar(s).
Charlie runs a book rental business. He currently charges $3 per book and rents out an average of 38 books a day.

According to a study, for every 50¢ increase in rental price, the average business can expect to lose 4 rentals a day.

Complete the equation that models this scenario, where b(x) is the revenue generated and x is the number of 50¢ price increases.

b(x) = - x^2 + x +