(-81) + 70=
U answer someone-

Iguess its b hope it ! : )

Ican only do part b, sorry : (there is only 1 pound of dark chocolate present because 25% times 3 pounds equals 75% which is the amount of milk chocolate present. 25% times 4 equals 100% which is amount of dark and milk chocolate together.sorry i couldn't do part a.i hope this : )