It takes you 4 hours to driving 180 miles .explain how to use mental math to find your average speed .then, explain how your method is related to the formula d=rt

Alina fully simplifies this polynomial and then writes it in standard form. xy2 – 2x2y + 3y3 – 6x2y + 4xy2 if alina wrote the last term as 3y3, which must be the first term of her polynomial in standard form? xy2 5xy2 –8x2y –2x2y