For f(x) = -3x^2 - 4x - 3, find f(x+h)-f(x)/h

If possible please explain how you got the answer.

What is x and y (use substitution? ) 5x+3y=38 and y=3x+8?

Create and solve a linear equation that represents the model, where squares and triangles are shown evenly balanced on a balance beam. assume the weight of a square is 1 unit and the weight of a triangle is unknown.

Big boi and travis scott are performing at the super bowl. travis scott is 62 years younger than twice big boi’s age. the sum of their ages is 70 years old. use b to represent big boi’s age. write and solve an equation.