Can someone help me find the length of b of the unknown side in this triangle? Thanks! :)

Simplify 15(x - 4)(x -1)-3(x + 4)(x - 1) with steps

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.

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.