Find the composition. If f(x) = 2x + 5 and g(x) = x + 2, find (f ? g)(x)

A. 2x + 7
B. 2x2 + 9x + 10
C. 2x + 9
D. 2x2 + 9


Answer: C

Mathematics

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Simplify.27.2 + 5.19 × (7.8 - 0.3)2 

A. 317.7375 B. 563.9375 C. 321.3375 D. 319.1375

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Solve the problem.Find an equation for the level curve of the function f(x, y) = dt that passes through the point .

A. y2 - x2 = 40 B. y2 - x2 = -32 C. y2 - x2 = 32 D. y2 + x2 = 40

Mathematics

Determine whether the Law of Sines or the Law of Cosines should be used to begin to solve the given triangle. Do not solve the triangle. 

A. Law of Sines B. Law of Cosines

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Solve the system by substitution.7x - 7y = 424x - 5y = 30

A. {(-1, -5)} B. ? C. {(0, -6)} D. {(0, -5)}

Mathematics