InequalitiesInequalities. An inequality is like an equation, but instead of an equal sign (=) it has...
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Transcript of InequalitiesInequalities. An inequality is like an equation, but instead of an equal sign (=) it has...
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InequalitiesInequalitiesInequalitiesInequalities
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An inequality is like an equation, but instead of an equal sign (=) it has one of these signs:
Inequalities work like equations, but they tell you whether one expression is bigger or smaller than the expression on the other side.
Inequalities work like equations, but they tell you whether one expression is bigger or smaller than the expression on the other side.
< “is less than”
> “is greater than”
≤ “is less than or equal to”
≥“is greater than or equal to”
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• "Solving'' an inequality means finding all of its solutions. A "solution'' of an inequality is a number which when substituted for the variable makes the inequality a true statement.
• "Solving'' an inequality means finding all of its solutions. A "solution'' of an inequality is a number which when substituted for the variable makes the inequality a true statement.
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< > •less than•fewer than
•greater than•more than•exceeds
•less than or equal to•no more than•at most
•greater than or equal to•no less than•at least
Inequality symbols
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Inequalities and their GraphsInequalities and their Graphs
Terms you see and need to know to graph inequalities correctly
Notice
open circles
< less than
> greater than
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Inequalities and their GraphsInequalities and their Graphs
Terms you see and need to know to graph inequalities correctly
Notice colored in circles
≤ less than or equal to
≥ greater than or equal to
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Inequalities and their GraphsInequalities and their Graphs
Let’s work a few together
3x3
Notice: when variable is on left side, sign shows direction of solution
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Inequalities and their GraphsInequalities and their Graphs
Let’s work a few together
7
Notice: when variable is on left side, sign shows direction of solution7x
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Inequalities and their GraphsInequalities and their Graphs
Let’s work a few together
-2
Notice: when variable is on left side, sign shows direction of solution
2pColor in circle
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Inequalities and their GraphsInequalities and their Graphs
Let’s work a few together
8
Notice: when variable is on left side, sign shows direction of solution
Color in circle
8x
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Try this one on your ownTry this one on your own
12x
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12
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On your OwnOn your Own
12s
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12
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On your OwnOn your Own
2m
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2
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Answer 1 through 5Answer 1 through 5
6b 1.
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On your OwnOn your Own
10x 2.
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On your OwnOn your Own
15p 3.
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On your OwnOn your Own
25g 4.
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On your OwnOn your Own
13x 5.
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Answer 6 through 10Answer 6 through 10
6.
b ≤ -7
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7.
a > 8
On your OwnOn your Own
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8.
q ≥ -5
On your OwnOn your Own
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9.
s < 14
On your OwnOn your Own
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10.
m ≥ 8
On your OwnOn your Own