Solve the equation by completing the square.x2 + 4x - 21 = 0
A. -14, -7
B. 
, -1
C. 3, -7
D. -3, 7
Answer: C
Mathematics
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Solve the problem.The equation for free fall at the surface of Planet X is 
with t in seconds. Assume a rock is dropped from the top of a 
cliff. Find the speed of the rock at 
A. 3.72 m/sec B. 4.72 m/sec C. 9.44 m/sec D. 10.44 m/sec
Mathematics
Factor completely, or state that the polynomial is prime.y3 - 15y2 + 225y
A. prime B. y(y2 - 15y + 225) C. y(y + 15)2 D. y(y - 15)2
Mathematics
The graph of a system of equations is shown. Give the type of system (consistent, inconsistent, or dependent) and the number of solutions. If there is only one solution, give the solution.
A. Consistent, (0, -1) B. Dependent C. Consistent, (-1, 0) D. Inconsistent
Mathematics
Sketch the graph using a graphing utility.5x2 + 3xy + 5y2 = 11
A. 
B. 
C. 
D. 
Mathematics