Unit Test — Cumulative exam Answers
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21
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Using the quadratic formula to solve 11x2 – 4x = 1, what are the values of x?
A
StartFraction 2 Over 11 EndFraction plus-or-minus StartFraction StartRoot 15 EndRoot Over 11 EndFraction
B
StartFraction 2 Over 11 EndFraction plus-or-minus StartFraction 2 StartRoot 15 EndRoot Over 11 EndFraction
C
StartFraction 2 Over 11 EndFraction plus-or-minus StartFraction StartRoot 7 EndRoot Over 11 EndFraction
D
StartFraction 2 Over 11 EndFraction plus-or-minus StartFraction StartRoot 7 EndRoot i Over 11 EndFraction
22
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Which classification describes the following system of equations?
A
inconsistent and dependentB
consistent and dependentC
consistent and independentD
inconsistent and independent23
Dylan uses the expressions (x2 – 2x + 8) and (2x2 + 5x – 7) to represent the length and width of his bedroom. Which expression represents the area (lw) of Dylan’s room?
A
mc026-1.jpg
B
mc026-2.jpg
C
mc026-3.jpg
D
mc026-4.jpg
24
If (x – 5) is a factor of f(x), which of the following must be true?
A
A root of f(x) is x = –5.B
A root of f(x) is x = 5.C
Both x = –5 and x = 5 are roots of f(x).D
Neither x = –5 nor x = 5 is a root of f(x).25
If the function has an inverse function, which statement must be true?
A
b not-equals 0
B
Option
C
Option
D
Option
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