[Scroll to the tool under "13.4: Seagulls and Sharks Again"]
In the applet, you may choose to start by clicking on the open circles on the seagull and shark to drag them to new vertical positions. Once you have them in place, drag each of the other animals to the vertical axis to show its position, determined by the expression next to it.
Question 1
1.
(-38.76)(-15.6) is negative
Question 2
2.
10,000 - 99,999 < 0
Question 3
3.
(\frac{3}{4})(-\frac{4}{3})=0
Question 4
4.
(30)(-80)-50=50-(30)(-80)
Question 5
5.
For each set of values for a and b, evaluate the given expressions and record your answers in the table.
Question 6
6.
When a=-\frac{1}{2} and b=6, which expression:
-has the largest value?
-has the smallest value?
-is the closest to zero?
Question 7
7.
When a=\frac{1}{2} and b=-6, which expression:
-has the largest value?
-has the smallest value?
-is the closest to zero?
Question 8
8.
When a=-6 and b=-\frac{1}{2}, which expression:
-has the largest value?
-has the smallest value?
-is the closest to zero?
Question 9
9.
Are there any values could you use for a and b that would make all of these expressions have the same value? Explain your reasoning.