H(x)= -x^2+ 3x + 5 What is the average rate of change from x = 3 to x = 5

Simplify the expression. -2/5(10+15m-20n)

A3-dimensional figure has a square base and 4 lateral faces that meet at a point. explain the difference between the cross sections when a slice is made perpendicular to the base through the vertex, and when a slice is made perpendicular to the base and not through the vertex

Which of the following contains a variable?