If the length of the first room is (2x+7) and the length of the second room is (2x - 1), which expression models the area of the new room once the wall is knocked down?
6x +12
O
4x2+18
4x2+ 13x-4
4x+18x +18

Peter applied to an accounting firm and a consulting firm. he knows that 30% of similarly qualified applicants receive job offers from the accounting firm, while only 20% of similarly qualified applicants receive job offers from the consulting firm. assume that receiving an offer from one firm is independent of receiving an offer from the other. what is the probability that both firms offer peter a job?