Solve the system of equations using Gaussian elimination or Gauss-Jordan elimination. x + y + z = 5 x - y + 5z = 254x + y + z = 14
A. (4, 3, -2)
B. (3, -2, 4)
C. (4, -2, 3)
D. No solution
Answer: B
Mathematics
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Solve the problem by integration.The electric power p developed in a certain resistor is given by 
where t is the time. Express p as a function of t.
A. p = - 
ln 
B. p = - 
ln 
C. p = 
ln 
D. p = 
ln 
Mathematics
Solve the inequality.5x ? 5(x + 9)
A. (-?, 5] B. ? C. (-?, ?) D. (-?, 9]
Mathematics
Insert ? or ? in the blank to make the statement true.{0, 2, 4, 7} 
{2, 4, 7, 8, 9, 10}
A. ? B. ?
Mathematics
Determine whether the given function is one-to-one. If it is one-to-one, find its inverse.f(x) = x 
A. f-1(x) = x3 - 3
B. Not one-to-one
C. f-1(x) = x 
D. f-1(x) = x2 + 3
Mathematics