10:24 OF . 2. What is a in the equation 5x + 9x' = 1? * 1 point A. - 1 O B. 1 O c. 5 O D. 9 3. Which of the following is in the standard form? * 1 point A. -7x = -1 - 3x2 B. 4 + x2 = 5x C. 2x + 8x2 = 7 O D. 9x2 - 5X + 7 = 0 4. What are the square roots of 16? * 1 point A. 18 O B. 14 O C. +2 D. +1 A ! 5. How many real solutions does x' = -64 juve?* 1 point O10:25 FOE . 11. What must be added to x" + 16x to make it a perfect square trinomial? * 1 point A. 8 B. 16 C. 64 D. 256 12. What are the roots of the quadratic equation x' + 16x = -48? * 1 point A. - 2, - 7 O B. -4, - 12 O C. -6, -12 O D. - 7, -7 13. The solution to the quadratic equation ax' + bx + c = 0 are * 1 point x - -b+vb2-4ac 20 O A . O