Solve the system.  x2 - xy + y2 = 32x2 + xy + 2y2 = 12

A. {(1, 0), (-1, 0)}
B. {(2, 0), (-2, 0), (1, 0), (-1, 0)}
C. {(2, 1), (1, 2)}
D. {(2, 1), (-2, -1), (1, 2), (-1, -2)}


Answer: D

Mathematics

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Differentiate the function.r(t) = (-6t2 + 14)i + j

A. r'(t) = (-12t)i + j
B. r'(t) = (-12)i + j
C. r'(t) = (-12t)i - j
D. r'(t) i + (-12t)j

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Solve the problem. Round to the nearest cent.Approximately 34% of Samantha's gross monthly income is deducted for Social Security, federal withholdings, state withholdings, insurance, etc. If her gross monthly salary is $2679, then what is her net pay?

A. $1500.24 B. $910.86 C. $1768.14 D. $1178.76

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Provide an appropriate response.Simplify: (3x)3

What will be an ideal response?

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Solve the problem.An-Mei owns a business making and selling jackets. She has a fixed cost of $4050. It costs $69 to produce each jacket. The selling price is $96 per jacket. Let x represent the number of jackets produced and sold and write the cost function, C, and revenue function, R.

A. C(x) = 69x + 4050 R(x) = 96x B. C(x) = 69 + 4050x R(x) = 96 C. C(x) = 69x + 4050x R(x) = 96x D. C(x) = 69 + 96x R(x) = 4050x

Mathematics