Por favor sumar 3/4 4/5 7/8

What numbers are included in the set of integers? what numbers are not included?

If olu is twice as old as funmi if the sum of their ages is 60 how old is olu

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)