The reduced row echelon form of the augmented matrix of a system of equations is given. Find the solutions of the system. 
A. (-2, 18, 6, 2, 0)
B. No solution
C. (-2, 18, 6, 2, w) for any real number w
D. (-2, 18, 6, 2)
Answer: C
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Determine whether the statement is a self-contradiction, an implication, a tautology (that is not also an implication), or none of these.[(p ? q) ? (q ? r)] ? (p ? r)
A. Self-contradiction B. Tautology C. Implication D. None of these
Solve the problem.
A man plans to invest $15,000 over 4 years in an annuity at 6%, and he wants the best plan. Annuity 1 is a monthly ordinary annuity of $312.50 compounded monthly. Annuity 2 is a semiannual ordinary annuity of $1875.00 compounded semiannually. Annuity 3 is a quarterly annuity due of $937.50 compounded quarterly. Annuity 4 is a yearly annuity due of $3750.00 compounded annually. What annuity yields the greatest future value?
A. Annuity 2 B. Annuity 4 C. Annuity 3 D. Annuity 1
Tell whether the triangles are similar or not similar.
A. Similar B. Not similar
Find the present value. Round to the nearest cent.
A. $44,578.42 B. $20,417.50 C. $20,189.10 D. $9810.90