Simplify -2x^3y x xy^2

a. -12x^4y^3
b. -3x^4y^3
c. -2x^4y^3
d. -2x^3y^4

Plz hurry evaluate the expression a+b where a=8 and b=19

Two airplanes start at the same place and travel in opposite directions,one at 395 miles per hour and the other at 422 miles per hour. how many hours will it take for the planes to be 2451 miles apart?

Mr.walker is looking at the fundraiser totals for the last five years , how does the mean of the totals compare to the median?