Solve the system by using the inverse of the coefficient matrix. 7x - 4y + 9z = 78-3x + 6y - 9z = -60-6x - 3y + 5z = 3
A. (5, -1, 6)
B. (4, 1, 6)
C. (1, 6, 1)
D. (4, -1, -6)
Answer: B
Mathematics
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Factor completely.21t3 - 91t2 - 70t
A. 7(t + 5)(3t - 2) B. t(3t + 2)(7t - 35) C. (t2 - 5)(21t + 14) D. 7t(t - 5)(3t + 2)
Mathematics
Find an equation for the line.
A. y = 2x - 9
B. y = 2x + 6
C. y = 
x + 
D. y = 2x + 7
Mathematics
Perform the indicated operation and write the answer in lowest terms. 
+ 
A. 
B. 
C. 
D. 
Mathematics
Find the expression that is equivalent to the given rational expression.
A. 
B. - 
C. - 
D. 
Mathematics