Find the sum and express it in simplest form (-7s+8b+6)+(5s-3b)

What is the y-intercept of the line given by the equation

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?

Determine the standard form of the equation of the line that passes through (-2,0) and (8,-5)