Question

Check each answer to see whether the students evaluated the expression correctly. If the answer is incorrect cross out the answer and write the correct answer. 8(x+2)when x= 68(6+2) = 48 +2 = 50

Answer 1

The answer is not correct. There is a mistake applying the distributive property.

The distributive property says:

$a(b+c)=ab+ac$

But in this case, the 8 only multiplies the 6, and not the 2. The correct procedure is:

$8(6+2)=8\cdot6+8\cdot2=48+16=64$

The correct answer is 64