Use Cramer's rule to solve the system. If D = 0, use another method to complete the solution. x + 2y - 3z + w = 7 3x + 4y - z + 2w = 4-2x + y + z - w = -3 x - y + 2z - 2w = 1
A. 
B. 
C. 
D. 
Answer: B
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To find 50% of a number, divide the number by 2 585.67
A. 292.835 B. 1171.34 C. 117134 D. 2342.68
Solve the problem. Assume all data are accurate to two significant digits unless greater accuracy is given.Two pieces of equipment were purchased for a total of $2000. If one piece cost $810 more than the other, find the price of the less expensive piece of equipment.
A. $1400 B. $600 C. $595 D. $1405
Determine whether the ordered pair is a solution of the given equation.(-2, 1)2x + 4y = -8
A. Yes B. No
Solve the equation. State whether the equation is a contradiction, an identity, or a conditional equation.6(x + 4) = (6x + 24)
A. ? or { }; contradiction B. {0}; conditional equation C. {48}; conditional equation D. all real numbers; identity