Simplify (8j3 − 10j2 − 7) − (6j3 − 10j2 − j + 12).

What is sin 7x/4 ? i need on this urgent trig

What are the solutions of the system? solve by graphing. y = x^2 + 3x + 2 y = 2x + 2

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.