Solve the quadratic equation by completing the square.x2 + 3x - 9 = 0
A. x = -3 ± 3
B. x = 
C. x = 
D. x = 
Answer: D
Mathematics
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Use a special product formula to simplify.(6w + 11m)(11m - 6w)
A. 121m2 - 132mw - 36w2 B. 121m2 - 36w2 C. 121m2 + 132mw - 36w2 D. 11m2 - 6w2
Mathematics
Solve the problem.During each cycle, the vertical displacement s of the end of a robot arm is given by 
where t is the time. Find the expression for the instantaneous velocity of the end of the robot arm.
A. 8t3 - 15t2 + 6t - 2 B. 8t3 - 13t2 + 6t + 2 C. 2t3 - 15t2 + 3t - 2 D. 8t2 - 10t + 2
Mathematics
The rectangular coordinates of a point are given. Find polar coordinates of the point. Express ? in radians.(3, -3)
A. (3
, 135°)
B. (-3
, 225°)
C. (-3
, 45°)
D. (-3
, 135°)
Mathematics
Complete the table with ordered pairs that are solutions.y = 4x - 7
A. 
B. 
C. 
D. 
Mathematics