Mini-Quiz: Properties or Laws of Addition and Multiplication

1. Which of the following is equal to x + z(5 − 2y)?

   z(−5 − 2y) + xGood try, but not right. Select another answer. z + x(5 − 2y)Sorry, not correct. Try another button. z(5 − 2y) + xThat is correct. You understand the principles.

2. Which of the following is the same as (2x − 3y) + 2xyz − 7?

   2x − (3y + 2xyz) − 7Sorry, not correct. Try another button. 2x − 3y + (2xyz − 7)Correct. You are doing great! 2x − (3y + 2xyz − 7)Oops! Wrong answer. Re-read the question and try again.

3. Which of the following is equal to −7(3 − 2y − z)?

   −21 − 14y − 7zOops! Wrong answer. Re-read the question and try again. 21 + 14y − 7zGood try, but not right. Select another answer. −21 + 14y + 7zThat is correct. You understand the principles.

Pick an answer to see instant feedback. Re-read the lesson if you miss one.