Solve the problem.Let x represent the number of cassette tapes sold at $9.50 per tape, and let y represent the total cost of the cassette tapes. Use an equation to calculate the cost of 13 cassettes.
A. $0.73
B. $247
C. $61.75
D. $123.5
Answer: D
Mathematics
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A.
B.
C.
D.
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Factor by grouping.x3 + 9x2 + x + 9
A. (x2 + 1)(x + 9) B. (9x2 + 9)(x + 1) C. (x2 + 9)(x + 1) D. (x2 + 1)(9x + 9)
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Find the indicated extreme value of f subject to the given constraint.Maximum of 
subject to 
A. Maximum: 8 at 
B. Maximum: -31 at 
C. Maximum: -4 at 
D. Maximum: 4 at 
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Rationalize the denominator. Assume variables represent non-negative values.
A. 
B. 
C. 
D. 
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