Provide an appropriate response.Solving for which variable in which equation involves the least amount of work? 5x + 2y = 18-6x - 3y = -21

A. x in equation 1
B. x in equation 2
C. y in equation 2
D. y in equation 1

Answer: C

Mathematics

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Solve.Frank can type a report in 3 hours and James takes 5 hours. How long will it take the two of them typing together?

A.  hr
B.  hr
C.  hr
D. 5 hr

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Evaluate as instructed.Evaluate (f+g)(3).

A. 1 B. 0 C. 3 D. -1

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Use a commutative property to complete the statement. Do not simplify.a + (-5) = 

A. -a + 5 B. -5a C. -5 + a D. 5 + a

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Multiply. Simplify, if possible.5 ? 9

A. -40 B. 45 C. 36 D. 40

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Mathematics