Algebra Know-It-ALL

Do not refer to the text when taking this test. A good score is at least 80 percent of the

answers correct. Answers are in the back of the book. It’s best to have a friend check your

score the first time, so you won’t memorize the answers if you want to take the test again.

This test is long. Don’t try to do it all 547in one sitting!

1. Which of the following procedures, if any, is not an acceptable way to modify an
   equation?
   (a) Add a positive integer to the part of the equation to the left of the equals sign, and
   add the same positive integer to the part of the equation to the right of the equals
   sign.
   (b) Subtract a positive integer from the part of the equation to the left of the equals
   sign, and subtract the same positive integer from the part of the equation to the
   right of the equals sign.
   (c) Multiply the part of the equation to the left of the equals sign by a positive integer,
   and multiply the part of the equation to the right of the equals sign by the same
   positive integer.
   (d) Divide the part of the equation to the left of the equals sign by a positive integer,
   and divide the part of the equation to the right of the equals sign by the same
   positive integer.
   (e) All of the above procedures are acceptable.


2. Consider the following pair of equations as a two-by-two linear system:

x= 4 y− 3

and

x= 4 y+ 2

545

Final Exam

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