Radical Equations and Extraneous Roots — Unit test Answers
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1
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If y is a positive integer, for how many different values of y is a whole number?
A
1B
2C
6D
152
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Which expression is equivalent to ?
A
StartFraction x Superscript one-half baseline Over y z squared EndFraction
B
StartFraction x Superscript one-half baseline Over y Superscript one-fourth Baseline z squared EndFraction
C
StartFraction y Superscript one-half Baseline Over x z squared EndFraction
D
StartFraction x z squared Over y Superscript one-half EndFraction
3
What is the following sum?
A
6 b squared (RootIndex 3 StartRoot 2 a EndRoot)
B
12 b squared (RootIndex 3 StartRoot 2 a EndRoot
C
6 b squared (RootIndex 6 StartRoot 2 a EndRoot)
D
12 b squared (RootIndex 6 StartRoot 2 a EndRoot)
4
Which expression is equivalent to ? Assume and .
A
StartFraction a cubed b (RootIndex 3 StartRoot 15 b squared EndRoot) Over 2 c cubed EndFraction
B
StartFraction b (RootIndex 3 StartRoot 15 b EndRoot) Over 2 a squared c cubed EndFraction
C
StartFraction a cubed b (RootIndex 3 StartRoot 15 b squared EndRoot) Over 6 c cubed EndFraction
D
StartFraction b (RootIndex 3 StartRoot 15 b EndRoot) Over 2 a c EndFraction
5
What is the simplified form of the following expression?
A
StartRoot 3 EndRoot
B
9 StartRoot 3 EndRoot
C
11 StartRoot 3 EndRoot
D
15 StartRoot 3 EndRoot
6
The mean sustained wind velocity, v, can be determined by the equation , where p is the air pressure, in millibars, at the center of the hurricane. What is the approximate air pressure at the center of a hurricane when the mean sustained wind velocity is 64 meters per second?
A
103 millibarsB
194 millibarsC
363 millibarsD
910 millibars7
What values of c and d make the equation true? Assume and
A
c = 1, d = 3B
c = 1, d = 9C
c = 2, d = 8D
c = 2, d = 98
Jamal simplified the expression where and . Which describes the error Jamal made?
A
He should have written the square root of in the answer as , not .
B
He should have written the square root of in the answer as , not .
C
He should have written the 5 inside of the radical in the answer.D
He should have written the 3 outside of the radical in the answer.Did you find these answers helpful?
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