In the straightedge and compass construction of the equilateral triangle below , which of the following reasons can use to prove that ab and bc are congruent answers above !

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.

Common binomial factor of 6x(3x+7)+5(3x+7)

Which one is the correct answer, and why?