Which equations show that the set of whole numbers is closed under addition?
choose all answers that are correct.
a.
0 + (–1) = –1
b.
1 + 1 = 2
c.
2 + 0 = 2
d.
2 + (–1) = 1

Np4=12np2 with clear explanation.

What is the solution of the systems of equations? y=2/3x+3 x=-2

Jamie went to home depot.she bought 25 bags of soil that cost $9 per bag.she bought 15 pots at $8 each, and she bought 23 bags of pebbles at $15 each.she used a coupon that gave her $5 off for every 100 dollars she spent. how much did jamie pay at the end?