Find the union.{0, 3, 9, 15} ? {a, b}
A. {0, 3, 9, 15}
B. ?
C. {a, b}
D. {0, 3, 9, 15, a, b}
Answer: D
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Find 
.y = ?x2 + 4x
A. (?x2 + 4x) ln ? (2x + 4) B. (?x2 + 4x) ln ? C. (?x2 + 4x) (2x + 4) D. (x2 + 4x) ?x2 + 4x - 1
Find the limit L for the given function f, the point x0, and the positive number ?. Then find a number ? > 0 such that, for all x, 
f(x) = 
, x0 = 7, ? = 0.4
A. L = 4; ? = 1.56 B. L = 4; ? = 0.78 C. L = 4; ? = 7.78 D. L = 4; ? = 0.64
Solve using the addition principle.t - 8 = 12
A. -20 B. 4 C. -4 D. 20
Refer to the table of the six basic solutions to the e-system.
In basic solution (B), identify the basic and nonbasic variables and determine if the solution is feasible or not feasible.
A. Basic variables: x2, s2 Nonbasic variables: x1, s1 Solution is not feasible. B. Basic variables: x1, s2 Nonbasic variables: x2, s1 Solution is not feasible. C. Basic variables: x2, s2 Nonbasic variables: x1, s1 Solution is feasible. D. Basic variables: x2, s1 Nonbasic variables: x1, s2 Solution is not feasible.