Answer:
Step-by-step explanation:
For example draw something in the room that is rectangular. Like a table or a book. Also, answer the other corresponding questions.
ANSWER
The correct answer is D.

EXPLANATION
The given expression is

The symbol means summation.
So we need to substitute

into the formula and add all to get,

We simplify to obtain,

The correct answer is D
4x+6=12
4x=12-6
4x=6
4x/4=6/4
X=1.5