The answer is B. (2 + x) + 3y.
The associative change happened when they just moved the parenthesis.
Hope this helps!
We know, y - y1 = m(x - x1)
y - 9 = 2(x - 3)
y - 9 = 2x - 6
y = 2x + 3
In short, Your Answer would be Option B
Hope this helps!
Mistake in Line 2 : Was in the determining the values for a ,b,c
Mistake in Line 4 : Not taking the square roots of both sides.
Step-by-step explanation:

First Mistake : Line 2

Second Mistake : Line 4

Correct Solution :


2 meters = 200 centimeters