Justify each step used to simplify the expression
1. 3x + 2y - 2x + 2 = 3x - 2x + 2y + 2
2. = (3x – 2x) + 2y + 2
3. = (3 - 2)x + 2y + 2
4. = x + 2y + 2

If there is 20 dogs in the shelter and 5 dogs get homes, and then 43 more dogs come. how many dogs are there in the shelter?

Ireally need subtract and simplify.(-y^2 – 4y - 8) – (-4y^2 – 6y + 3)show your work, ! i will mark you brainliest but you have to show your work.

Will mark determine whether the conjecture is true or false. give a counterexample for any false conjecture. given: points r, s, and t conjecture: r, s, and t are coplanar. a) false; the points do not have to be in a straight line. b) true c) false; the points to not have to form right angles. d) false; one point may not be between the other two.