You have several pieces of wood 0.83m 1.26m 0.53m 4.09m 3.5m add the lengths together to give the total length

Aportion of a line bounded by two points is defined as

Adam drew two same size rectangles and divided them into the same number of equal parts. he shaded 1/3 of one rectangle and 1/4 of the other rectangle. what is the least number of parts into which both rectangles could be divided into?

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)