Solve the system of equations using Gaussian elimination or Gauss-Jordan elimination.4x + 4y - 4z = -2116x + 17y - 15z = -78x + 9y - 7z = 12
A. 
B. 
C. 
D. No solution
Answer: D
Mathematics
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Find the gradient field of the function.f(x, y, z) = ln (x8 + y3 + z3)
A. ?f = 
i + 
j + 
k
B. ?f = 
ln ( y3 + z3)i + 
ln (x8 + z3)j + 
ln ( x8 + y3)k
C. ?f = 
i + 
j + 
k
D. ?f = 
i + 
j + 
k
Mathematics
Write using exponential notation.7 × 7 × 7
A. 73 B. 37 C. 71 D. 3 × 7
Mathematics
Find the solution set for each inequality. Graph the solution set on a number line and write it in interval notation.|x + 7| ? 0
A. (-?, -7) ? (-7, ?)
B. {-7}
C. (-?, 7) ? (7, ?)
D. (-?, ?)
Mathematics
Solve the equation. 
= 7
A. 10, 4 B. -10, 4 C. No solution D. -4
Mathematics