What is the result of dividing x3−7 by x + 2?

A) x2−2x+4−15x+2

B) x2−2x+4+1x+2

C) x2−2x+4+15x+2

D) x2−2x+4−1x+2

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of