1. These are Elementary Row Operations (EROs):
a. Multiply a row by a non-zero scalar
b. Add a row to another row
c. All of the above
d. None of the above
2. If we include an additional constraint to a linear program, its new feasible region:
a. Remains the same
b. Is now bigger
c. Is now smaller
d. a) or b)
e. a) or c)
3. If we have a >= constraint with all variables on the LHS, all we need to do to reexpress it as an equation is subtract an slack variable
True
False
4. In a min problem, the optimality test consists in verifying that the reduced costs for all non-basic variables are non-positive
True or False