What is the solution to the following equation? 2x2 + 7x +9=31

A: x = -5.5
B: x = 2 or x = -5.5
C: x = 1 or x = -4.6
D: the equation has no solution.

Evaluate the expression for the given value of the variable 7a - 4a for a =8

What is the volume of a rectangular crate that has dimensions 9 inches by 9 inches by 1 feet? 1,458 in.3 121.5 in.3 1,012.5 in.3 36 in.3

Johnny rode his bike to a friends house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was unable to play. what was his displacement for the total bike ride trip? what could you use as a reference point ? show the steps to solve this problem.