Can a point of a Courtney play be represent by more than one ordered pair and how do you know

Which statement justifies why angle ebc measures 90?

True or false: the graph of y=f(bx) is a horizontal compression of the graph y=f(x) if b< 1

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