Unit Test — Unit test Answers
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21
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Randy divides (2x4 – 3x3 – 3x2 + 7x – 3) by (x2 – 2x + 1) as shown below. What error does Randy make?
A
He makes a subtraction error.B
He makes an error writing the constant term in the quotient.C
He makes an error choosing the x-term in the quotient.D
He makes an error rewriting the problem in long division.22
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The volume of a rectangular prism is (x4 + 4x3 + 3x2 + 8x + 4), and the area of its base is (x3 + 3x2 + 8). If the volume of a rectangular prism is the product of its base area and height, what is the height of the prism?
A
x + 1 minus StartFraction 4 Over x Superscript 4 Baseline + 4 x cubed + 3 x squared + 8 x + 4 EndFraction
B
x + 1 + StartFraction 4 Over x Superscript 4 Baseline + 4 x cubed + 3 x squared + 8 x + 4 EndFraction
C
x + 1 minus StartFraction 4 Over x cubed + 3 x squared + 8 EndFraction
D
x + 1 + StartFraction 4 Over x cubed + 3 x squared + 8 EndFraction
23
Which expression is equivalent to ? Assume .
A
StartFraction m Superscript 5 Baseline Over 162 n EndFraction
B
StartFraction 1 Over 2 m cubed n EndFraction
C
StartFraction 8 m Superscript 9 Baseline Over n Superscript 9 Baseline EndFraction
D
StartFraction 4 m Superscript 8 Baseline Over 3 n cubed EndFraction
24
What are the solutions of the equation (2x + 3)2 + 8(2x + 3) + 11 = 0? Use u substitution and the quadratic formula to solve.
A
x = StartFraction negative 4 plus-or-minus StartRoot 5 EndRoot Over 2 EndFraction
B
x = StartFraction negative 7 plus-or-minus StartRoot 5 EndRoot Over 2 EndFraction
C
x = –7 and x = –2D
x = –1 and x = 4
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