Ihave this algebra question i can’t do someone pls me

What is the solution of log2  (3x  -  7)  =  3? 4 5

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

Explain how you can find the missing fraction in 3 4/5 / (blank) 2 5/7. then find the missing fraction.