Question

A student attempted to generate an equivalent expression using the distributive property, as shown below:

2(x + 5) = 2x + 5

What was the mistake made?
A: 2 was not multiplied by x
B: 2 was not multiplied by 5
C: Incorrect sign was used for the first term
D: Incorrect sign was used for the second term

Answer 1

B

Explanation:

because you first do x+5 first so then it will be 2 x 5x

Answer 2

In the equation 2(x+5) = 2x +5
You need to use distributive property so your answer would be 2x + 10.
So the mistake that was made is...

B: 2 was not multiplied by 5