Why must you know how to square numbers and find square roots to use the Pythagorean Theorem?​

What is the solution to the system of equations? (–2, –8) (–1, –5) (0, –2) (2, 4)

Which of the points a(6, 2), b(0, 0), c(3, 2), d(−12, 8), e(−12, −8) belong to the graph of direct variation y= 2/3 x?

Bernice paid $162 in interest on a loan of $1800 borrowed at 6%. how long did it take her to pay the loan off?