Convert the equation given in polar form into rectangular form.r = -5 cos ?
A. 2 + y2 =
B. 2 + y2 = 25
C. x2 + y2 = 5
D. x = -5
Answer: A
Mathematics
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A. Symmetric about the y-axis
B. No symmetry
C. Symmetric about the y-axis
D. No symmetry
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Solve the problem.Find the impedance Z when the voltage is V = -8 + 4j and current is I = -7j. (Z = )
A. +
j
B. - +
j
C. +
j
D. - -
j
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Choose the best answer.The volume of a coffee mug is about
A. 0.3 dam3 B. 0.3 mm3 C. 0.3 L D. 0.3 dm3
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Write the word statement as an equation. Use x to represent the unknown number. Do not solve.The product of 4 and the difference of a number and 7 is the same as the sum of the number and 21.
A. 4(7 - x) = x + 21 B. 4(x - 7) = x + 21 C. 4x - 7 = x + 21 D. 7 - 4x = x + 21
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