Solve. x - y + 4z = -54x + z = 0 x + 5y + z = 25
A. (0, 5, 0)
B. (0, 5, -5)
C. (0, -5, 5)
D. (0, 0, 5)
Answer: A
Mathematics
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Add or subtract. Assume all variables represent positive real numbers.
+ 
A. 
B. 
C. 
D. 
Mathematics
Evaluate the expression for the given replacement values.
+ y2
x = 5, y = 9
A. 
B. 
C. 
D. 43
Mathematics
The matrix is the final matrix form for a system of two linear equations in variables x1 and x2. Write the Solution of the system.
A. x1 = 3 x2 = 5 B. x1 = -5 x2 = -3 C. x1 = 5 x2 = t for any real number t D. x1 = 5 x2 = 3
Mathematics
Solve the system of equations using Cramer's Rule if it is applicable. If Cramer's Rule is not applicable, say so.
A. x = 6, y = 8, z = 6; (6, 8, 6) B. x = 1, y = 6, z = 8; (1, 6, 8) C. x = 1, y = -6, z = -8; (1, -6, -8) D. x = 2, y = 4, z = 8; (2, 4, 8)
Mathematics