Use Gaussian elimination to find the complete solution to the system of equations, or state that none exists.x + 8y + 8z=87x + 7y + z=18x + 15y + 9z=-9
A. {(0, 0, 1)}
B. ?
C. {(-1, 0, 1)}
D. {(1, -1, 1)}
Answer: B
Mathematics
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Find the average value of the function f over the given region.f(x, y) = 5x + 2y over the rectangle 0 ? x ? 6, 0 ? y ? 9.
A. 
B. 16
C. 15
D. 24
Mathematics
Solve the system using Gaussian elimination. -3x - 9y + 9z = 42 9x + 27y - 27z = -126-12x - 36y + 36z = 168
A. {(x, y, z) 
-3x - 9y + 9z = 42}
B. ?
C. {(x, y, z) 
-12x - 36y + 36z = 42}
D. {(-8, -9, -7)}
Mathematics
Given p is true, q is true, and r is false, find the truth value of the statement.~q ? (p ? r)
A. False B. True
Mathematics
Simplify.
A. 64
B. 8
C. 
D. 
Mathematics