If the equations 100x+300=500 and x+3=5 give the same answer, how are they related? please help this is due soon

Solve the given system of equations. 2y= -x+9 , 3x-6= -15

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

Are the corresponding angles congruent? explain why or why not.