3^2 is an example of A. a numerical equation
B. a numerical expression
C. an algebraic equation
D. an algebraic expression

Ifigured out the question and i dont know what to put here

What is the sum of these mixed numbers 2 1/8 + 4 3/8

Kapil needed to buy a long wooden beam. he went to two sawmills that each charge an initial fee plus an additional fee for each meter of wood. the following equation gives the price (in dollars) of a wooden beam from the first sawmill as a function of its length (in meters). p = 5+20xp=5+20x