Question

Evaluate 4(2a - b) when a = -1 and b = 5

A -48
B -28
C -12
D 32

Answer 1

I'd suggest you enclose -1 and 5 within brackets as shown:


4( 2[-1] - [5] ).  Do the work within parentheses FIRST:  4( -7 ).
Then multiply as indicated:  -28