AnswersAlgebra Concepts and ConnectionsInvestigating Rational and Irrational Numbers

Practice Test Answers

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1
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What is the product? Assume y≠0. negative 1 times open paren 3 x over 2 y close paren

A
the fraction with numerator negative 3 x and denominator negative 2 y
B
negative 3 x over 2 y
C
2 x over 3 y
D
negative 2 x over 3 y
2
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Which rational expression is undefined when A is equal to 1 ?

A
the fraction with numerator 8 A squared and denominator 5 A minus 10
B
the fraction with numerator 10 A plus 6 and denominator negative A squared plus 1
C
the fraction with numerator 9 A minus 3 and denominator 3 A squared
D
the fraction with numerator 6 A squared minus 6 and denominator 7 A plus 7
3

Which equation is a radical equation?

A
cube root of 8 plus 2 n is equal to cube root of 12 plus n
B
cube root of 8 plus d squared is equal to d square root of 16
C
3 d is equal to square root of d plus 5 end root
D
square root of 10 plus h is equal to 5 plus 2 h
4

What is the solution to the equation 3 plus 4th root of 4 y is equal to 4 ?

A
y is equal to 1
B
y is equal to 4
C
y is equal to 1 fourth
D
y is equal to 1 sixteenth
5

Morgan made a mistake when subtracting the rational expressions. the fraction with numerator 3 t squared minus 4 t plus 1 and denominator t plus 3 minus the fraction with numerator t squared plus 2 t plus 2 and denominator t plus 3 is equal to the fraction with numerator 2 t squared minus 2 t plus 3 and denominator t plus 3 What was Morgan’s error?

A
Morgan forgot to cancel out the plus 3 in the numerator and denominator as her final step.
B
Morgan forgot to distribute the negative sign to two of the terms in the second expression.
C
Morgan forgot to combine only like terms.
D
Morgan forgot to subtract the denominators as well as the numerators.

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