PLEASE HELP Segment Bisector Construction

The pyramid below was dissected by a horizontal plane which shape describes the pyramid horizontal cross section

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10

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?