Use substitution to factor the polynomial.10x4 + 21x2 + 9
A. (10x2 + 3)(x2 + 3)
B. (2x2 + 1)(5x2 + 9)
C. (2x2 + 3)(5x2 + 3)
D. (5x2 - 3)(2x2 - 3)
Answer: C
Mathematics
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A. 
B. 
C. 
D. 
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Perform the indicated operation and simplify.
? 
A. 
B. 
C. 
D. 
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Tell whether the statement is true or false.Let A = {3, 4, 5, 6, 7, 8}, B = {5, 7, 9}, C = {3, 4, 6, 8}, D = {3, 8}, and 
B ? C
A. True B. False
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For the given equation, state whether the directrix is vertical or horizontal and give its location in relation to the pole.r = 
A. Horizontal, 6 units above the pole B. Vertical, 3 units to the right of the pole C. Horizontal, 3 units above the pole D. Vertical, 6 units to the right of the pole
Mathematics