Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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1.
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a. | (2, –1) | c. | (2, 1) | b. | no solution | d. | (–2,
–1) |
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2.
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Use substitution to solve the system of equations. 
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3.
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If the system  is to be solved by substitution, which expression can be
replaced for x in the second equation? a. | 15 - 2y | c. |  | b. | 21 - 5x | d. |  |
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4.
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Solve the system  by substitution. a. | {(2, 7)} | c. | {(5, 1)} | b. | {(1, -1)} | d. | none of these |
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Short Answer
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5.
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Use substitution to solve the system of equations. 
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6.
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Use substitution to solve the system of equations. 
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