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Things of Importance
No More Late Homeworks as of Today
 We are not doing 9.4 and on, but we are
doing 10.1 thru 10.3 at the end of the
semester

Section 9.2&9.3
Solving Inequalities
Definition of the “Solution set of an
inequality”:
 The answers that work and make the
inequality true
 X+5>8

 Putting
in 7, 4, 10 for x make it true.
 Putting in 3, 0, -978973 make it false.
Solving Inequalities
Nirzwan’s trouble-free method for solving
all inequalities
 1. Solve the equation as if there was an
“equals” sign in place of the inequality.
 2. If you multiply or divide by a negative
number immediately switch the direction
of the inequality.
 3. Graph as needed!

Examples
1.
 2.
 3.
 4.
 5.

x-8<-3
5x-6≤4x-4
(-3/2)x ≤ 6
-8<12x
Application problem
Now you try it #1,2,3,4 pg 418 & 420
 End of 9.2

Slightly Longer Problems
4y-3 ≥ 6y +5
 15-5(3-2x) ≤ 4(x-3)

Try these
 5-4x>9-8x
 8-4(3x+5) ≤ 6(x-8)

Homework for 9.2 and 9.3
 9.2
- 1-79 every other odd
 9.3 - 1-20 every other odd and
problems 28, 30, 34.