Answer:
Explanation:
We want to determine which expressions are equal to 3(n+6).
- (B) If we expand the bracket, 3(n+6)=3n+18
- (D) 2(n+6)+(n+6)
If we Simplify this, 2(n+6)+(n+6)= (2+1)(n+6)=3(n+6)
All other expressions are not equivalent.
A) 3n+6≠3(n+6) because the parenthesis is missing.
(C)2n+2+n+4 simplifies as 3n+6 which we have proven to be wrong
(E)2(n+6)+n simplifies as 3n+12