Evaluate the expression for the given value or values.-x2 - 6y when x = -2, y = -4
A. -20
B. -28
C. 16
D. 20
Answer: D
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Find the surface area of the circular solid. Unless otherwise specified, use 3.14 for ? and round your answer to the nearest tenth.If the diameter of a sphere is 20 feet, find the surface area of the sphere. Give an exact answer.
A. 1600? square feet B. 800? square feet C. 400? square feet D. 1200? square feet
Write the fraction as a decimal.
A. 0.000816 B. 0.816 C. 0.00816 D. 0.0816
Match the given function to its graph.1) y = sin (
x)2) y = 
cos x3) y = 
sin x 4) y = cos (
x)A B
height="200" width="200" />CD
A. 1A, 2B, 3C, 4D
B. 1A, 2C, 3D, 4B
C. 1B, 2D, 3C, 4A
D. 1A, 2D, 3C, 4B
Determine the x- and y-intercepts of the graph of the quadratic equation.y = x2 + 4x
A. x-intercepts: 0, 4; y-intercept: 0 B. x-intercepts: 0, -4; y-intercept: none C. x-intercepts: 0, -4; y-intercept: 0 D. x-intercepts: 0, 4; y-intercept: none