Use synthetic substitution to find f (2) and f (-1) for the function.
f (x) = x3 – x2 – 2x + 3

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