This is a function notation and evaluating function

Abag contains 4 red, 7 blue and 5 yellow marbles. event a is defined as drawing a yellow marble on the first draw and event b is defined as drawing a blue marble on the second draw. if two marbles are drawn from the bag, one after the other and not replaced, what is p(b|a) expressed in simplest form? a. 7/16 b. 7/15 c. 14/16 d. 14/15

Complete the synthetic division problem below.what is the quotient in polynomial form 2/16 -16

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.