1.   Solve  x2 + 7x + 8 = 0.
    A. B.
    C. D.
    Hint

  2.   Suppose a ball is thrown straight up at a speed of 50 feet per second. The time in seconds that it takes for the ball to hit the ground can be found by solving the equation 5 + 50t - 16t2 = 0. Approximately how long does it take for the ball to hit the ground?
    A. -0.1 s B. 4.8 s
    C. 0.1 s D. 3.2 s
    Hint

  3.   Use the quadratic formula to solve 6x2 - x - 1 = 0.
    A. B.
    C. D.
    Hint

  4.   Solve x2 + 14x + 49 = 0 by using the quadratic formula.
    A. –7 B. 7
    C. 6, 8 D. –6, –8
    Hint

  5.   Solve by using the quadratic formula.
    A. B.
    C. D.
    Hint