Find the specified vector or scalar.u = 3i - 2j, v = -9i + 7j; Find u - v.
A. 12i - 9j
B. 10i + 5j
C. 11i + 5j
D. -6i + 5j
Answer: A
Mathematics
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Determine the symmetries of the curve.r = -2 sin ? - 4 cos ?
A. x-axis, y-axis, origin B. y-axis only C. x-axis only D. No symmetry
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Solve the system by elimination.9x + 8y = 0 6x - 2y = 0
A. {(0, 1)} B. {(2, 1)} C. {(0, 0)} D. ?
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Perform the indicated operations.-9(9 - 44) ÷ (-63)
A. -7 B. 5 C. 7 D. -5
Mathematics
Write the relationship as a formula.If two capacitors C1 and C2 are connected in series, the total capacitance Ct is found by dividing the product of the two capacitances by their sum.
A. Ct = 
B. Ct = 
2
C. Ct = 
D. Ct = 
Mathematics