Perform the desired operation. Write the answer in the form a + bi.-2i(-2 + 3i)
A. 4i - 6i2
B. -6 + 4i
C. 4i + 6i2
D. 6 + 4i
Answer: D
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Perform the indicated operation.10.1 m + 42 cm (in meters)
A. 4,210.1 m B. 52.1 m C. 10.52 m D. 14.3 m
Solve the problem.The numbers on the right in the equations below are the hexagonal numbers. Use the sequence of equations to find a formula for hn, the nth hexagonal number. 1 = 1 1 + 5 = 6 1 + 5 + 9 = 15 1 + 5 + 9 + 13 = 28 ..............
A. hn = (n - 1)(2n + 1) B. hn = 2n(n - 1) C. hn = n(2n - 1) D. hn = n(2n + 1)
Write the fraction as a whole or mixed number.
A. 2
B. 2
C. 1
D. 3
Solve the system by using Gaussian elimination with backward substitution or by reducing the matrix to reduced-row echelon form. x - y + 3z = -114x + z = -2 x + 3y + z = 13
A. (-2, 0, 5) B. No solution C. (-2, 5, 0) D. (0, 5, -2)