What does x and y equal? 2x - y = -1 and -5x + y = -5

Which expressions are equivalent to k/2 choose 2 answers: a k-2 b 2/k c 1/2k d k/2 e k+k

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?

To solve the system of equations below, grace isolated the variable y in the first equation and then substituted into the second equation. what was the resulting equation? 3y=12x x^2/4+y^2/9=1