What kind of system is the set of equations? -3x-3y=1 5x+2y=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

Can anyone me get through my algebra 2 class? the only class i need to graduate..

Find the sum of the given arithmetic series. 24 + 17 + 10 + 3 + + (–39)