Factor the sum or difference of two cubes.x3 + 729

A. (x + 9)(x2 + 81)
B. (x + 9)(x2 - 9x + 81)
C. (x - 9)(x2 + 9x + 81)
D. (x - 729)(x2 - 1)

Answer: B

Mathematics

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A.

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C.

D.

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Determine the equation of the line described. Put answer in the slope-intercept form, if possible.Through (-3, -9), perpendicular to -9x - 5y = 72

A. y = x
B. y = x - 66
C. y = x -  
D. y = - x +  

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Write the equation of the function in the form f(x) = ax2 + bx + c.

A. f(x) = -x2 - 4x + 8 B. f(x) = -x2 + 2x - 8 C. f(x) = x2 - 4x + 8 D. f(x) = -x2 + 2x + 8

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Refer to the figure with B the midpoint of side and E the midpoint of side .



If CD = x ? 2, AF = 2x ?2, and BE = x +4 , find x.
(a) 6 (b) 12 (c) 18 (d) 24

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Mathematics