Use the Gauss-Jordan method to solve the system of equations. 5x - y + z = 8 7x + y + z = 612x + 2z = 14
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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Solve.A rectangular plot of land measure 70 feet by 140 feet. Find its area.
A. 210 sq ft B. 420 sq ft C. 980 sq ft D. 9800 sq ft
Mathematics
Find all rational zeros.f(x) = 4x3 - 16x2 - x + 4
A. 
, - 
, -4
B. 1, -1, 4
C. 
, - 
, 4
D. 2, -2, 4
Mathematics
Solve the equation. Use words or set notation to identify equations that have no solution, or equations that are true for all real numbers. 5x - 4 + 5x + 6 = 3x + 7x - 1
A. {0} B. {x|x is a real number} C. {160} D. ?
Mathematics
Multiply.
? 
A. 
B. 
C. 
D. 
Mathematics