Manuel has 3 times as many quarters as dimes totaling $6.80. how many of each coin does he have?

Choose the point slope form of the equation below that represents the like that passes through the points (-6,4) and (2, 0)

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?

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.