Solve the equation by completing the square. Express any complex numbers using i notation.x2 + 18x = -71
A. x = -18 + 
B. x = 9 + 
C. x = -9 ± 
D. x = 9 ± 
Answer: C
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Find the average value of 
over the given region.
over the cube in the first octant bounded by the coordinate planes and the planes 
, 
, 
A. 9 B. 52 C. 36 D. 18
Use properties of logarithms to expand the logarithmic expression as much as possible. Where possible, evaluate logarithmic expressions without using a calculator.ln y-z
A. z ln y B. y ln z C. -z ln y D. -y ln z
Solve the problem.A box with an open top is formed by cutting squares out of the corners of a rectangular piece of cardboard and then folding up the sides. If x represents the length of the side of the square cut from each corner, and if the original piece of cardboard is 14 inches by 8 inches, what size square must be cut if the volume of the box is to be 72 cubic inches? 
A. 1 in. by 1 in. square B. 12 in. by 12 in. square C. 6 in. by 6 in. square D. 4 in. by 4 in. square
Use the graph to find the indicated function value.y = f(x). Find f(1)
A. 3.4 B. 0.3 C. -0.3 D. -3.4