What is the axis of symmetry of h(x) = 5x2 + 40x + 64?

x = −16
x = −4
x = 4
x = 16

The expression 6x2 gives the surface area of a cube, and the expression x3 gives the volume of a cube, where x is the length of one side of the cube. find the surface area and the volume of a cube with a side length of 6m

Iwant to know what 3g+5h+4g-2h is my teacher is too selfish to tell us

Mrs. morton has a special reward system for her class. when all her students behave well, she rewards them by putting 3 marbles into a marble jar. when the jar has 100 or more marbles, the students have a party. right now, the the jar has 24 marbles. how could mrs. morton reward the class in order for the students to have a party?