Solve the system by the substitution method.x2 - y2 = 39 x - y = 3
A. {(-8, -5)}
B. {(8, -5)}
C. {(-8, 5)}
D. {(8, 5)}
Answer: D
Mathematics
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Find 
.y = (x + 8) sin x
A. cos x ln (x + 8) + 
B. sin x ln (x + 8)
C. (x + 8) sin x
D. 
(x + 8) sin x
Mathematics
Find an upper bound for the magnitude |E| of the error in the approximation f(x, y) ? L(x, y) at the given point over the given region R.
at 
; R: |x - 2| ? 0.2, |y - 1| ? 0.2
A. |E| ? 27.8784 B. |E| ? 21.8388 C. |E| ? 15.2064 D. |E| ? 21.5424
Mathematics
Answer the question or solve the problem.If b < 0, is it true that b2 > b? Explain.
What will be an ideal response?
Mathematics
Solve the rational inequality and graph the solution set on a real number line. 
< 0
A. (-?, -8) ? (6, ?)
B. (-8, 6)
C. (-?, -8)
D. (6, ?)
Mathematics