Which of the following expressions are equivalent to x+2-x

Which matrix can be multiplied to the left of a vector matrix to get a new vector matrix ?

Just tell me how to set up the equation.

Describe the end behavior of the function below. f(x)=(2/3)^x-2 a. as x increases, f(x) approaches infinity. b. as x decreases, f(x) approaches 2. c. as x increases, f(x) approaches -2. d. as x decreases, f(x) approaches negative infinity.