Find any excluded values.
A. 9, -7, 23
B. -9, -7
C. -9, -7, 23
D. 9, -7
Answer: D
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Provide an appropriate response. Under which of the following conditions of k will this quadratic, x2 + 8x + k = 0, have real-number, but unequal roots?
A. k ? 16 B. k ? 16 C. k > 16 D. k < 16
Provide an appropriate response.Which one of the following methods cannot be used to solve the equation 
A. Completing the square B. Factoring C. All of the methods can be used. D. Quadratic formula
Translate the problem to a system of equations, then solve using Cramer's Rule.The perimeter of a rectangle is 24 meters. If the width is doubled and the length is tripled, the perimeter is 60 meters. Determine the original width and length.
A. width = 10 m, length = 20 m B. width = 8 m, length = 12 m C. width = 6 m, length = 6 m D. width = 12 m, length = 12 m
Provide an appropriate response.Perform the operation and simplify your answer: 
Fill in the blank(s) with the appropriate word(s).