Multiply and simplify.
? 
A. 
B. 
C. - 
D. - 
Answer: D
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Solve the problem.The intensity I of light decreases from its value I0 as it passes a distance x through a medium. Given that 
where k is a constant depending on the medium, find x for 
and 
A. 2.690 cm B. 0.598 cm C. 1.83 cm D. -2.690 cm
Solve the system of equations.5x + 2y + z = -112x - 3y - z = 177x + y + 2z = -4
A. (0, -6, 1) B. (-3, 0, 4) C. (3, 0, -4) D. (0, 6, -1)
Graph.y = 
x
A. 
B. 
C. 
D. 
Solve.A box is constructed by cutting out square corners of a rectangular piece of cardboard and folding up the sides. If the cutout corners have sides with length x, then the volume of the box is given by the polynomial 
Factor out the greatest common factor for this expression.
A. 4x(x2 - 18x + 45) B. 4(x3 - 18x2 + 45x) C. 4x(x2 + 18x + 45) D. 2x(2x2 - 36x + 90)