Apply row operations to the augmented matrix to find the solution to the linear system.

A. x = -3, y = 1
B. x = 3, y = -1
C. x = -1, y = 3
D. x = 1, y = -3

Answer: D

Mathematics

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Find the extreme values of the function subject to the given constraint.  

A. Maximum: none; minimum:   at  
B. Maximum: none; minimum:   at  
C. Maximum: none; minimum:   at  
D. Maximum: none; minimum: 2 at  

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Follow the proper order of operations to evaluate the following.

A. - 
B. 48
C.
D. undefined

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Multiply.9 ? 40

A. 400 B. 360 C. 320 D. 49

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The function f is one-to-one. Find its inverse.f(x) = x2 + 1, x ? 0

A. f-1(x) = , x ? -1
B. f-1(x) =  - 1, x ? 0
C. f-1(x) = , x ? 1
D. f-1(x) =  - 1, x < 0

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Mathematics