Chapter 12 Notes
Math 7
Inequalities
Name:_________________________________ HR:______ Date:_________________
Section:
12.4
Pages: 710-713
Objectives: Students read and write inequalities and graph them on a number line.
Vocabulary Words:
 Inequality – a mathematical sentence that shows the relationship between quantities that are not
equivalent. They will have a symbol from the chart below.
Less than
Greater than
Less than or Equal to
Greater than or Equal to
<
>
≤
≥

Algebraic Inequality – an inequality that contains a variable.

Solution Set- all of the solutions to an inequality.

Compound Inequality- the result of combining two inequalities.
Ex. 1 Write an inequality for each situation.
Ex. 2 Graph each inequality.
Ex. 3 Graph each compound inequality.
Name:_________________________________ HR:______ Date:_________________
Section:
12.5
Pages: 714-717
Objectives: Students solve one-step inequalities by adding or subtracting.
Ex. 1 Solve. Then graph each solution set on a number line.
Ex. 2 Solve.
Ex. 3 Yesterday’s high temperature was 30°F. Tomorrow’s weather forecast includes a high temperature that is
no more than 12°F warmer than yesterday’s. What high temperatures are forecast for tomorrow?
Name:_________________________________ HR:______ Date:_________________
Section:
12.6
Pages: 718-721
Objectives: Students solve one-step inequalities by multiplying and dividing.
Ex. 1 Solve.
Ex. 2 Solve.
Ex. 3 It cost Deirdre $212 to make candles. How many candles must she sell at $8 apiece to make a profit?