Solve the system of equations using Cramer's Rule if it is applicable. If Cramer's Rule is not applicable, say so.
A. x = 5, y = -2; (5, -2)
B. x = 2, y = -5; (2, -5)
C. x = -5, y = -2; (-5, -2)
D. x = -2, y = 5; (-2, 5)
Answer: D
Mathematics
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.
A. cot 
B. cot 
C. csc 
D. tan 
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Use the Pythagorean formula to find the exact length of side b in the figure.
A. b = 
B. b = 
C. b = 
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Find the first term a1 and the common difference d of the arithmetic sequence.0.7, 0.62, 0.54, 0.46, 0.38, . . .
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Mathematics