What is the simplified form of the expression 6 ( 4x - 7)

Solve for x, y, and z. show all steps.

Rewrite the following quadratic functions in intercept or factored form. show your work. f(x) = 3x^2 - 12

Add, subtract, multiply, or divide as indicated. list any restrictions for the variable(s) and simplify the answers when possible. 1) x-2 / x+5 + 3x / 2x-1 2) x+6 / x-6 - x^2 / x+6 3) x+9 / x-4 + x+2 / x^2-11x+28 4) x / x^2-64 + 11 / 2x^2+11x-40 5) 5 / x + 11 / x-3 - x-4 / x^2+2x-15