Expand and simplify: (x − 5y) (x + 3y)

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

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

Find the measurement of angle b in the following triangle