Unit Test — Unit test Answers
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The graphs of two polynomial equations do not intersect. Kelly concludes that the system has no solution. Which statement best explains why Kelly’s reasoning is correct or incorrect?
A
She is incorrect because systems may have only complex solutions which are not visible on a graph.B
She is incorrect because the solutions may have multiplicity greater than 1.C
She is correct because all solutions are intersection points of the graphs.D
She is correct because the solutions are irrational.22
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A cube has side length x. One side of the cube is increased by 4 inches, and another side is doubled. The volume of the new rectangular prism is 450 cubic inches. The equation can be used to find x. What was the side length of the original cube? Use a graphing calculator and a system of equations to find the answer.
A
4 inchesB
5 inchesC
9 inchesD
10 inches23
What is the value of ?
A
–4B
Negative one-fourth
C
One-fourth
D
4
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