Write the phrase as a mathematical expression. Use x to represent the number. Combine like terms if possible.A number multiplied by -6, subtracted from the sum of 15 and four times the number

A. (15 + 4x) - (-6)x; 15 + 10x
B. 6x - (15 + 4x); 2x - 15
C. (15 + 4x) + (-6)x; 15 - 2x
D. 6x - 19

Answer: A

Mathematics

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Find the mass of the wire that lies along the curve r and has density ?.r(t) = (6 cos t)i + (6 sin t)j + 6tk, 0 ? t ? 2?; ? = 9

A. 18? units
B. 648? units
C. 108? units
D. 12? units

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Express the number in scientific notation.0.000315

A. 3.15 × 10-3 B. 3.15 × 104 C. 3.15 × 10-4 D. 3.15 × 10-5

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Provide an appropriate response.Subtract: 72,007 - 4,386

A. 76,393 B. 34,616 C. 67,621 D. 43,389 E. none of the above

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Convert as indicated.92.28 g to milligrams

A. 9,228 mg B. 0.09228 mg C. 0.009228 mg D. 92,280 mg

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Mathematics