Help now plzz its urgent

7x+8y=-18, 4x-9y=-3 solve the system of equations

It took alice 5 5/6 hours to drive to her grandparents' house for . on the way home, she ran into traffic and it took her 7 3/8 hours. how much longer did the return trip take? write your answer as a proper fraction or mixed number in simplest form. the trip home took __hours longer. ?

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2