Factor completely. State that the polynomial is prime if it cannot be factored.9x2 + 5x - 4
A. (9x - 8)(9x - 4)
B. (9x - 4)(x - 1)
C. (4 - 9x)(9x - 4)
D. (9x - 4)(x + 1)
Answer: D
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Show that the equation is not an identity by listing the value(s) of the variable from among 0, 
, 
, and - 
for which the equation is false.(sin ? + cos ?)2 = 1
A. 0 and 
B. - 
C. 
and - 
D. 
As part of a statistics project, a 6th grade teacher brings to class a container with 200 red marbles and 800 white marbles which are thoroughly mixed. To figure out how many marbles in the container are red without actually counting them all, a student randomly draws 150 marbles from the container. Of the 150 marbles drawn, 33 are red.The sampling method used in this example is called
A. random sampling, but not simple random sampling. B. quota sampling. C. stratified sampling. D. simple random sampling. E. none of these
Sketch the graph of the equation. Identify the vertex and the intercepts.y = 2x2 + 8x + 12
A. Vertex (-2, 4)
x-intercepts: none
y-intercept: 
B. Vertex: (-2, 4)
x-intercepts: none
y-intercept: (0, 12)
C. Vertex (2, 4)
x-intercepts: none
y-intercept (0, 12)
D. Vertex (2, 4)
x-intercepts: none
y-intercept 
Factor out the GCF.80x9y7 - 48x3y4 + 80x5y2
A. 16(5x9y7 - 3x3y4 + 5x5y2) B. 16x3y2(5x6y5 - 3y2 + 5x2) C. 16x3(5x6y7 - 3y4 + 5x2y2) D. No common factor