How do you write a ratio ad a percent

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

Graph the equationy=x^2 -[tex]y = x^{2} - 2[/tex]

Factor the polynomial expression x6 – x3 – 20