Is there an identity element?

Figure 5.18 shows the cover of a leading mathematics journal. It depicts the symbols for the twelve animals in the Chinese zodiac. (2013, for example, is the year of the snake and 2014 is the year of the horse.) Use this cover illustration to answer the questions in Problems 33–36.

Figure 5.18

Transcribed Image Text:

MATHEMATICS TEACHER NATIONAL COUNCIL OF TEACHERS OF MATHEMATICS !2000 = 46987 . - MAKING SENSE OF SLOPE . CHAOTIC BEHAVIOR 46 0 46 9 * * 16 **** leje ** * $ 2 0/0 * * ** 14 +10. 7 ** **** 210/21 * .. *1*. 0/0 4 201 10 6 *10 ** $10 *1* * 4 *10 # *10 Volume 35 Number 2 February 2000 *1*1*1* * 1080 4 18 $. (B. $ E 2/1 4 +. *. P/8) # a + M A Principles and Standards for COMING APRIL 2000 School Mathematics