Write the expression in the standard form a + bi.i11
A. 1
B. i
C. -1
D. -i
Answer: D
Mathematics
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Solve the problem.n! =
A. 
n(n - 1)
B. 1 × 2 × 3 × ... × n
C. 1 + 2 + 3 + ... + n
D. n + 1
E. none of these
Mathematics
Use Gauss-Jordan elimination to find the solution. Write the solution as an ordered triple.5x + 2y + z = -112x - 3y - z = 177x + y + 2z = -4
A. (0, 6, -1) B. (3, 0, -4) C. (-3, 0, 4) D. (0, -6, 1)
Mathematics
Factor the expression completely, if possible.x4 - 81
A. (x + 3)2(x - 3)2 B. (x2 + 9)(x + 3)(x - 3) C. (x2 - 9)(x + 3)(x - 3) D. Does not factor
Mathematics
First use front-end rounding to write an estimate of the answer, and then add the decimals to obtain an exact answer.EstimateProblem
? 
A. Estimate: 59, exact: 55.67 B. Estimate: 59, exact: 65.67 C. Estimate: 60, exact: 66.67 D. Estimate: 59, exact: 64.67
Mathematics