2-2 & 2-3 solving inequalities using addition, subtraction, multiplication and division
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2-2 & 2-3 Solving Inequalities using addition, subtraction, multiplication and division
Adding & Subtracting to Solve Solve the same way you would normally solve for a
variable in an equation. Examples: Write, Graph & Solve
x+12 < 20
d-5 > -7
0.9 ≥ x-0.3
Adding & Subtracting to Solve
0 Sami has a gift card. She used $14 of the total value, which was $30. Write, solve & graph an inequality to show how much more she can spend.
What If…..?
TRUE or FALSE
8 > 48 (-2) > 4(-2)
-16 > -8 TRUE or FLASE?
Multiplying/ Dividing by Negatives
8 > 48 (-2) > 4(-2)
-16 > -8 TRUE or FLASE?
Flip the Sign!!
-16 < -8TRUE or FLASE?
Multiplying/Dividing
We ONLY flip the sign if we are multiplying or dividing by a negative.
We DO NOT need to flip the sign if we are not multiplying/dividing by a negative.
Examples
1. 7x > -42
2. -12x > 84
3. ¾r < 12
4. -8 ≤ x/-3