What is the greatest common factor of 35x2y5 and 15xy ?

Idon't get undoing if its pass adding and subtracting so can someone ? x-2 over 5 = 18

Margie is practicing for an upcoming tennis tournament. her first serve is good 20 out of 30 times on average. margie wants to know the estimated probability that her first serve will be good at least four of the next six times she serves. how could she design a simulation for this scenario?

Which is the graph of the following inequality?