The correct answer is 20.
square root 2 times square root of 200 = square root of 400 ans since 400 is a perfect square, then I'll calculate to 20.
question 3: -2
question 4: 0
Ordered pairs in a graph go in the sequence of (x, y)
I think the answer is 1 but I can’t see the picture
I believe it is referred to as The Substitution Method.