The area of a triangle is 1/2 (x^2 - 2x +2x^2 -4). the height h is x+2 write an expression for the base b of the triangle. ( hint: area of a triangle + 1/2 bh)

Commutative property

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 : )