Which statements are true about the ordered pair (1,2) and the system of equations? y=-2x+4 7x-2y=3 select all that apply. a. when (1,2) is substituted into the second equation, the equation is true. b. the ordered pair (1,2) is not a solution to the system of linear equations. c. when (1,2) is substituted into the second equation, the equation is false. d. when (1,2) is substituted into the first equation , the equation is false. e. the ordered pair (1,2) is a solution to the system of linear equations. f. when (1,2) is substituted into the first equation, the equation is true