Algebra help please

If sr is 4.5cm and tr is 3cm, what is the measure in degrees of angle s?

Complete the solution of the equation. find the value of y when x equals to 28 x+3y=28

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.