Express the sum using sigma notation:

1 + 3/4 + 5/9 + 7/16 + 9/25

What is the solution of the systems of equations? y=2/3x+3 x=-2

Aboat costs 19200 and decreases in value by 12% per year. how much will it cost in 5 years

60 musicians applied for a job at a music school. 14 of the musicians play both guitar and drums, 28 play drums, 18 play the guitar. what is the probability that the applicant who gets the job plays drums or guitar?