Bob and jimmy went to the gym to lift weights. jimmy lifted twice as much as bob. together they lifted 51lbs. how much did each boy lift?

Can someone me my sister? she is in third grade. 50 points and brainlist! ones that are not answered. plz and thx!

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

5x + 2 = 12 solve the following equation. then place the correct number in the box provided.