Decide whether the composite functions, f ? g and g ? f, are equal to x.f(x) = x3 + 9, g(x) = 
A. Yes, yes
B. Yes, no
C. No, no
D. No, yes
Answer: A
Mathematics
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At what points is the given function continuous?f(x, y) = 
A. All (x, y) such that 7x + 7y ? 0 B. All (x, y) such that x + y ? 0 C. All (x, y) such that 7x + 7y ? 0 D. All (x, y)
Mathematics
Find the domain and graph the function.F(t) = 
A. D: (-?, -3) ? (-3, ?)
B. D: (-?, -3) ? (-3>, ?)
C. D: (-?, 0) ? (0, ?)
D. D: (-?, ?)
Mathematics
Use a calculator to find the function value.sin 53.9°
A. 0.589 B. 0.808 C. -0.473 D. 1.37
Mathematics
Change the number to polar form and then perform the indicated operations. Express the result in rectangular form.(2 - 2j)5
A. -64
+ 64
j
B. -64 + 64j
C. -128 + 128j
D. - 
+ 
j
Mathematics