Help timed test!!:

What is the name used to describe a graph where for some value of x, there exists 2 or more different values of y?

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

Which of the following circles have their centers in the third quadrant? check all that apply.