Remove parentheses and simplify.(4x - 9y + 3) - 2(-4x + 9y - 3)

A. -8x + 18y - 6
B. -12x + 27y - 9
C. 12x - 27y + 9
D. 8x - 18y + 6


Answer: C

Mathematics

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Write the equation for the plane.The plane through the point A(5, 5, 9) perpendicular to the vector from the origin to A.

A. 5x + 5y + 9z = 131
B. 5x + 5y + 9z = 19
C. 5x + 5y + 9z =  
D. 5x + 5y + 9z = -131

Mathematics

Solve the problem. Round to the nearest tenth when necessary.The roof of a building is in the shape of the hyperbola  where x and y are in meters. Refer to the figure and determine the height h of the outside walls.A = 9 m

A. 93 m B. 69 m C. 9.6 m D. 3 m

Mathematics

Find the quotient and the remainder.7x3 + 59x2 - 27x + 81 divided by x + 9

A. 7x2 - 4x + 9; remainder 0 B. x2 + 4x + 7; remainder 0 C. x2 + 5x + 6; remainder 0 D. 7x2 + 4x + 9; remainder 0

Mathematics

Find the product AB, if possible.A = , B = 

A.

B. AB is not defined.
C.

D.

Mathematics