Answer:
Correct option: C.
(Both Joey and Nolan)
Step-by-step explanation:
The step Joey did is:
Add 7x to both sides of the equation
Then, he got:
13x - 42 + 7x = 18 - 7x + 7x
20x - 42 = 18
The step Nolan did is:
Add 42 to both sides of the equation
Then, he got:
13x - 42 + 42 = 18 - 7x + 42
13x = 60 - 7x
So both of them used correctly the addition property of equality in the first step of their work.
Correct option: C.
A. X = 3, because (3-2=1) (3+10=13)
1•13 = (13)
Answer:
if the triangle forms a 90 degree angle
Step-by-step explanation:
if you can make a perfect square on one of the corners of the of the triangle then it is a right triangle