Solve the problem.If twice a number is increased by 1, the result is 55. Find the number.

A. 24
B. 27
C. 32
D. 54

Answer: B

Mathematics

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Answer the question about the given function.Given the function f(x) = -4x2 + 8x + 4, if x = 1, what is f(x)? What point is on the graph of f?

A. -8; (1, -8) B. -8; (-8, 1) C. 8; (8, 1) D. 8; (1, 8)

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Mathematics

Find the domain of the function.f(x) = 

A. all real numbers, or (-?, ?) B. {x|x ? -7}, or (-?, -7) ? (-7, ?) C. {x|x < 7}, or (-?, 7) D. {x|x ? 0}, or (-?, 0) ? (0, ?)

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Mathematics

Find the perimeter. Use 3.14 for ?.

A. 104.38 yd B. 140.76 yd C. 53.38 yd D. 80.07 yd

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Mathematics

Find the quadratic function y = f(x) that has the given vertex and whose graph passes through the given point.vertex ; passing through 

A. y = 18(x - a)2 - 
B. y = 18(x + a)2 + 
C. y = 18(x + a)2 - 
D. y = 18(x - a)2 + 

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Mathematics