Expand this equation x(3x+2)

Solve the system of equations. y= 2x y= x^2 - 15

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?

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. ?