The length of a rectangle represented by 3a plus 4b and it's width is represented by 6a minus 2b. write a polynomial for the perimeter of the rectangle. what is the minimum perimeter of the rectangle if a equals 12 and b equals a non zero number?

Paul bakes raisin bars in a pan shaped like a rectangular prism. the volume of the pan is 252 cubic inches. the length of the pan is 12 inches, and its width is 10 1/2 inches. what is the height of the pan? enter your answer in the box. will give brialist and pointsss !