Christopher read 4 books in 2 months. What was his rate of reading in books per
month?

What term makes it inconsistent y=2x - 4

Solve 3x-18=2y and 5x-6y=14 by elimination or substitution . show all !

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