Solve.A brick staircase has a total of 16 steps The bottom step requires 101 bricks. Each successive step requires 5 less bricks than the prior one. How many bricks are required to build the staircase?
A. 2216 bricks
B. 2032 bricks
C. 976 bricks
D. 1016 bricks
Answer: D
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Construct a truth table to determine when the lightbulb is on. That is, determine which switches must be open and which switches must be closed for the lightbulb to be on. 
A. The lightbulb will be on when p, q, and r are all closed; when p and q are closed and r is open; or when p and r are closed and q is open.
B. The lightbulb will be on when p, q, and r are all closed; when p and q are closed and r is open; when p and r are closed and q is open; or when p is closed and q and r are open.
C. The lightbulb will be on in all cases except when p and r are open and q is closed.
D. The lightbulb will be on when p and r are closed and q is open.
Solve the combined inequality and graph the solution set. Write the solution in interval notation.-27 ? -4x + 1 ? -7
A. [-7, -2]
B. (-7, -2)
C. (2, 7)
D. [2, 7]
Solve the problem.Dave bought 17 packets of cookies for $52.70 total. Each packet of cookies contains 10 cookies. Find the cost of each cookie to the nearest tenth of a cent.
A. 3.1¢ B. 0.3¢ C. 31.0¢ D. 32.1¢
Use Cramer's rule to solve the system.3x = -6y - 33x = -y - 13
A. {(2, -5)} B. {(-2, -5)} C. {(-5, -2)} D. {(-5, 2)}