How do i solve this by elimination {5x+y=0
5x+2y=30

Evaluate the expression for the given value of the variable 7a - 4a for a =8

Use the quadratic function to predict f(x) if x equals 8. f(x) = 25x2 − 28x + 585

Which statement accurately explains whether a reflection over the y axis and a 270° counterclockwise rotation would map figure acb onto itself?