Use Cramer's rule to solve the system.
x - 
y = 8
x + 
y = -12
A. 
B. 
C. 
D. ?
Answer: B
Mathematics
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Find the inverse of the function.f(x) = 
- 2, x ? 0
A. f-1(x) = -(x + 2)2, x ? 2 B. f-1(x) = (x - 2)2 C. f-1(x) = (x + 2)2, x ? 2 D. f-1(x) = x + 2, x ? 2
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Find two square roots for the complex number. Write your answer in standard form.
?
What will be an ideal response?
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Find f ? g.f(x) = x + 12, g(x) = x + 4
A. x2 + 48 B. x2 + 16x + 16 C. x2 + 13x + 48 D. x2 + 16x + 48
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Find the average.221, 205
A. 426 B. 214 C. 213 D. 212
Mathematics