Asystem of equations is given below:

y = –2x + 1
6x + 2y = 22

which of the following steps could be used to solve by substitution?
a. 6x + 2(−2x + 1) = 22
b. −2x + 1 = 6x + 2y
c. 6(−2x + 1) + 2y = 22
d. 6(y = −2x + 1)

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.