Use a regular convex 18 gon to answer the following angles what is the sum of the enterior angles

Atoy company is considering a cube or sphere-shaped container for packaging a new product. the height of the cube would equal the diameter of the sphere . compare the volume to surface area ratios of the containers. which packaging will be more efficient? for a sphere, sa =4πr²

Nine more than four times a number is the same as one less than twice the number. find the number?

Valentina is subtracting from . she finds the lcd to be 15y2. what is valentina's next step?