Confused on number 10. i put one solution, but i don’t know if it’s right. i got
12x+48=48+12x and then i solved for 24x=96 and got x=4.

is there another correct way how to do this? i would appreciate it!

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?

In a column proof the right column states your reasons

The figure shows the front side of a metal desk in the shape of a trapezoid. what is the area of this trapezoid? 10 ft²16 ft²32 ft²61 ft²