Simplifying Rational Expressions — Unit test Answers
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21
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Which expression is equivalent to ? Assume .
A
StartFraction 5 Over x Superscript 12 Baseline y Superscript 30 Baseline EndFraction
B
StartFraction 1 Over 5 x Superscript 8 Baseline y Superscript 13 Baseline EndFraction
C
StartFraction 5 Over x Superscript 4 Baseline y Superscript 7 Baseline EndFraction
D
StartFraction y Superscript 7 Baseline Over 5 x Superscript 4 Baseline EndFraction
22
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Which graph represents the function ?
A
On a coordinate plane, a hyperbola and parabola are shown. The hyperbola has a curve in quadrants 1 and 2. The parabola opens down and has a vertex at (0, 0).
B
On a coordinate plane, a hyperbola and a cubic functions are shown. They hyperbola has curves in quadrants 1 and 3, and the cubic function goes through (0, 0).
C
On a coordinate plane, a hyperbola is shown. One curve is in quadrant 1 and the other curves goes through quadrants 2 and 4.
D
On a coordinate plane, a hyperbola is shown. Both curves open downward in quadrants 3 and 4.
23
Which graph represents the function ?
A
On a coordinate plane, a hyperbola is shown. A curve opens up and to the right in quadrant 1, and another curve opens down and to the left in quadrant 3. A vertical asymptote is at x = 0.
B
On a coordinate plane, a hyperbola is shown. A curve opens up and to the right in quadrant 1, and another curve opens down and to the left in quadrant 3. A vertical asymptote is at x = 0.25.
C
On a coordinate plane, a hyperbola is shown. A curve opens up and to the left in quadrant 2, and another curve opens down and to the right in quadrant 4. A vertical asymptote is at x = 0.
D
On a coordinate plane, a hyperbola is shown. A curve opens up and to the left in quadrant 2, and another curve opens down and to the right in quadrant 4. A vertical asymptote is at x = 0.25.
24
Which statement is true about the discontinuities of the function f(x)?
A
There are asymptotes at and .
B
There are holes at and .
C
There are asymptotes at and .
D
There are holes at and .
25
Which expression is equivalent to 5y–3?
A
StartFraction 1 Over 125 y cubed EndFraction
B
StartFraction 1 Over 5 y cubed EndFraction
C
StartFraction 5 Over y cubed EndFraction
D
StartFraction 125 Over y cubed EndFraction
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