Simplify the expression (⎯+.)+(+.).

Which undefined geometric term is described as a location on a coordinate plane that is designed by an ordered pair (x,y) ?

Aball is dropped from a height of 10m above the ground. it bounce to 90% of its previous height on each bounce. what is the approximate height that the ball bounce to the fourth bounce?

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?