Which is not equivalent to -2+9a -4+ -3b -1× -7c 10+ -3d -3- -10

Solve this problem! extra ! 3025/5.5 = a/90.75 / = fraction

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?

Which graph of a hyperbola represents the equation 16x^2-y^2=16