Please answer question!!

What is the solution of 5/2x - 7 = 3/4x + 14 ? a. x = -6 b. x = 6 c. x= 8 d. x = 12

Females who lift weights are not going to develop large, bulky muscles because a. they have more muscle fibers than men b. they have thicker muscle fibers than men c. they have lower testosterone levels than men d. all of the above does not change length

C(x)=(2x^2+5x)/(x^3+8) what is maximum c(x)?