What is a + 1/10 = 5/10 (need fast)

Isabel graphed the following system of equations. 2x – y = 6 y = -3x + 4 she came up with the solution (2,-2). what were the 3 steps she did to get that solution? (make sure they are in the correct order)

If you prove that ∆wxz is congruent to ∆yzx, which general statement best describes what you have proved?

What is the mean of the data set 125, 141, 213, 155, 281