Rewrite the quadratic function in standard form by completing the square.f(x) = x2 + 18x
A. f(x) = (x - 9)2 + 9
B. f(x) = (x - 18)2 + 18
C. f(x) = (x + 9)2 - 81
D. f(x) = (x + 18)2 - 324
Answer: C
Mathematics
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a. 2.86 ð 103 b. 1 ð 102ú86 c. 1 ð 10-2ú86 d. 2.86 ð 10-2 e. 2.86 ð 10-4
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Solve the problem.In order for a chemical reaction to remain stable, its Celsius temperature must be no more than 
Find the Fahrenheit temperatures at which the reaction will remain stable. 
A. F ? 243.68° B. F ? 47.56° C. F ? 47.56° D. F ? 243.68°
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Solve using Cramer's rule.
A. (-4, 3) B. (3, 4) C. (4, 3) D. (-3, -4)
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Solve the equation.9x + 7x = 32
A. 2
B. 
C. 
D. 16
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