Use the Gauss-Jordan method to find A-1, if it exists.A = 
A. 
B. 
C. 
D. Does not exist
Answer: B
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Provide an appropriate response.Find the error in the following "proof" that the area inside the lemniscate 
and then find the correct area. A = 
= 
= 
= 0
What will be an ideal response?
Use the half-angle formulas to evaluate the given function.cos 
A. 0.2588 B. 0.3660 C. 0.7934 D. 0.9659
Solve.An omelette costs $1.00 more than Mario's order of pancakes. After treating his family to breakfast, Mario is sure that 6 omelettes and 3 orders of pancakes cost more than $25 but not more than $40, including tax of 7% and a tip of $3.50. In what price range is an order of pancakes?
A. [$1.54, $3.10] B. ($1.57, $3.12) C. ($1.54, $3.10] D. ($1.57, $3.12]
Match the point in polar coordinates with either A, B, C, or D on the graph.
A. A B. B C. C D. D