Asurf instructor has an initial fee of $12 and charges $8 per hour for lessons. explain how to determine what the y-intercept is and where it would be located on the graph.

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