Why would someone choose to use a graphing calculator
to solve a system of linear equations instead of graphing
by hand? Explain your reasoning.

For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)

The heaviest 16% of all men in weight weigh more than how many pounds ?

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.