What is X=
5/6 = 10/2x−3

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)

Don't know how to find x given these segment lengths

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