Write the expression in the standard form a + bi.Given z = 9 - 3i, evaluate z + 
.
A. -6i
B. 18 + 6i
C. 18
D. 18 - 6i
Answer: C
Mathematics
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Find fx, fy, and fz.f(x, y, z) = x2y + y2z + xz2
A. fx = 2xy; fy = x2 + 2yz; fz = y2 + 2xz B. fx = 2y + z2; fy = x2 + 2z; fz = y2 + 2x C. fx = 2xy + z2; fy = x2 + yz; fz = y2 + xz D. fx = 2xy + z2; fy = x2 + 2yz; fz = y2 + 2xz
Mathematics
Graph the rational function.
?
?
Note that the numerator and denominator of the fraction share a common factor.
?
A. ?
B. ?
C. ?
D. ?
Mathematics
Factor the binomial completely.x4 - 1
A. (x2 - 1)(x2 - 1) B. (x2 + 1)(x + 1)(x - 1) C. (x2 + 1)(x2 + 1) D. prime
Mathematics
Find the area under the graph of the function over the interval given.y = 
; [1, 3]
A. 
B. 3
C. 
D. 
Mathematics