Solve the system using the inverse of the coefficient matrix of the equivalent matrix equation.2x + 8y + 6z = 204x + 2y - 2z = -23x - y + z = 11
A. {(2, 1, 6)}
B. {(2, -1, 4)}
C. {(-1, 2, 1)}
D. ?
Answer: B
Mathematics
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Solve the equation for x, where x is restricted to the given interval.y = 3 tan 2x - 1, for x in 
A. x = 
arctan (3y + 3)
B. x = 2 arctan 
C. x = 2 arctan (3y + 3)
D. x = 
arctan 
Mathematics
Simplify the radical expression. Assume that all variables represent nonnegative real numbers.(10x - 6
)2
A. 100x2 + 252
B. 100x2 + 1764
C. 100x2 - 120x
+ 1764
D. 100x2 - 120x
+ 252
Mathematics
Find the average of the set of numbers.5
and 8
A. 14
B. 6
C. 6
D. 7
Mathematics
Solve.Find 631 less 96.
A. 533 B. 535 C. 727 D. 435
Mathematics