Question

If a = 8 and b = 4, then b(b+ a) - b = A. 12 B. 20 C. 44 D. 52

Answer 1

C. 44 is the answer 4(4+8)-4=44

Answer 2

Simple!
Okay first plug in the variables given to you.
4(4+8)-4=? Now lets solve.
First, in order to get rid of the paranthesis, multiply 4 by the numbers inside, which in this case are 4 and 8.
That will give us...
16+32-4. Now, remember PEMDAS?
Addition (A) comes before subtraction (S).
So lets add 16 and 32.
Thats 48.
Now 48-4= 44.
44 is our final answer (: so C