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: A
Mathematics
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Find the indicated term for the arithmetic sequence.a1 = -5, d = -2; a8
A. -19 B. 11 C. -21 D. 9
Mathematics
Tell whether the angle is acute, right, obtuse, or straight.?ADB 
A. Right B. Straight C. Acute D. Obtuse
Mathematics
Multiply.-10 ? (-3) ? 3
A. 90 B. 80 C. 190 D. -90
Mathematics
Use  figure 1.png)
or  figure 2.png)
to indicate whether the given object is an element of the given set.
 figure 3.png)
Mathematics