15. Which system has infinitely many solutions? . V- 2x+6 C. 4x+ 2y -5 y - Bx - 21 x- 1p-9 b. 4x - 4y=4 d. none of these X-PI 16. Which describes the number and type of roots of the equation 4x - 67 + 15x +2-07 a. 1 positive, 2 negative c. 3negative b. 2 positive, I negative d. 3 positive 17. For which of the following functions is / (-5) = 27 1. /x) =x+7 b. /(x) = le-6 d. none of these\f\f1. Determine whether the function ((xx)= 3:7-12x-24 has a minimum or maximum value and determine that value. 2. What is the vertex of the parabola y= 3 (x +2)2 + 41 3, Listall possible rational zeros of p(x) = 2x5-3x-+4x-6