What is the greatest common factor of 18 and 50

Consider a bag that contains 220 coins of which 6 are rare indian pennies. for the given pair of events a and b, complete parts (a) and (b) below. a: when one of the 220 coins is randomly selected, it is one of the 6 indian pennies. b: when another one of the 220 coins is randomly selected (with replacement), it is also one of the 6 indian pennies. a. determine whether events a and b are independent or dependent. b. find p(a and b), the probability that events a and b both occur.

What is the solution to the system of equation graphed belowa.(0,-4)b.(2,5),1),-3)

Find the volume of the solid bounded by the plane z=0 and the paraboloid z=1-x^2 –y^2