Astorage bin is 12ft long 4ft wide 2ft high what is the volume in cubic ft

Marcus needs to rewrite f(x) = x2 + 6x + 4 in vertex form.

The anwser cause i do not understand just plez

Someone answer this asap for the length, in feet, of a rectangular rug is represented by the expression 5x² + 2x. the width, in feet, is represented by the expression 3x². which expression represents the perimeter, in feet, of the rug? a. 8x² + 2x b. 8x² + 4x c. 16x² + 2x d. 16x² + 4x