Solve the problem.Use the formula A = ?r2 to find the exact area of a circle if its radius is 9 cm.

A. 26,244? cm2
B. 1458? cm2
C. 81? cm2
D. 18? cm2

Answer: B

Mathematics

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Solve the problem.Find (fg)(x) given f(x) = 3x + 1 and g(x) = 5x2 - 3.

A. 15x3 - 9x2 + 5x - 3 B. 3x3 + 5x2 - 3 C. 15x3 + 5x2 - 9x - 3 D. 15x3 - 3

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Mathematics

Simplify the expression.49 + (-50) - 8 - (-11) + (-30)

A. 10 B. -28 C. 32 D. -50

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Mathematics

Determine whether the given value is a solution to the given equation.s = 310; s + 49 = 360

A. solution B. not a solution

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Mathematics

Simplify.

A. -1
B.
C.
D. - 

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Mathematics