What is not a description of slope? A. rise over run
B. the rate of change of a line
C. change in yover the change in x
D. the ratio of horizontal change compared to vertical change

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