Find the area.
a = 3.9 ft, b = 10.8 ft
A. 42.12 ft2
B. 14.7 ft2
C. 84.24 ft2
D. 15.6 ft2
Answer: A
Mathematics
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Use the Gauss-Jordan method to solve the system of equations. -2x - 9y = 7 -4x - 18y = -9
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Mathematics