Expand and simplify 2(2x+7) + 3(x+ 1)

Vinay constructed this spinner based on the population of teachers at his school according to vinays model what is the probability that he will have a male history teacher two years in a row

Xy x xy if a and b are positive integers such that a*b=9 and b*a=72 what is the value of a/b

Last week , donnell practiced the piano 3 hours longer than marcus . together, marcus and donnell practiced the piano 11 hours . for how many hours did each young man practiced the piano