How to work this problem -1x-2y=13

We just started the introduction into circles and i have no idea how to do this.

Compare the following pair of numbers a and b in three ways. a. find the ratio of a to b. b. find the ratio of b to a. c. complete the sentence: a is percent of b. a=120 and b=340 a. the ratio of a to b is . b. the ratio of b to a is . c. a is nothing percent of b.

The function below show how much jayna and hannah charge for babysitting. which statement best compares the two plants?