The volume of a cone is 3pi x^3 cubic units and its height is x units. Which expression represents the radius of the cone's base, in units?
3x
5x
3pi x^2
9pi x^2

Fractions can be added and subtracted only if they're fractions. a. like b. proper c. improper d. unlike

In need of in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.

Which of the following equations are equivalent to -2m - 5m - 8 = 3 + (-7) + m? -15m = -4m -7m - 8 = m - 4 -3m - 8 = 4 - m m - 4 = -7m - 8 -8 - 7m = -4 + m -8 - 3m = 4 - m