12÷3x(-8+(-4)^2 -6) + 2 , i need to understand this a little more. and explain how you did it ?

If c(x) = 4x – 2 and d(x) = x2 + 5x, what is (cxd)(x)

Adj has a total of 1075 dance and rock songs on her system. the dance selection is 4 times the size of the rock selection. write a system of equations to represent the situation.

Zoey made 5 1/2 cups of trail mix for a camping trip. she wants to divide the trail mix into 3/4 cup servings. a. ten people are going on the trip. can zoey make enough 3/4 cup servings so that each person gets one serving? b. what size would the servings need to be for everyone to have a serving?