Does the point (3,7) satisfy the equation y=5x- -9

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

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)

In the equation sqrt(n+5)-sqrt(11-10)=1. what is the value of n