What are is evaporating from the pool at a rate of 5/8 of an inch per for 1/2 hours find the unit rate that the water is evaporating at in terms of inches per hour

Find the difference (8ab+a+2) - (3ab+6)

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

Hi, can anyone show me how to do this problem? 100 points for this. in advance