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8/13/2019 Pre-Algebra Lesson 1.9
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Inequalities
Objective: Use inequalities
8/13/2019 Pre-Algebra Lesson 1.9
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5-Minute CheckSolve each equation using the inverse operation.
1. 5 + r = 12
8/13/2019 Pre-Algebra Lesson 1.9
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5-Minute CheckSolve each equation using the inverse operation.
1. 5 + r = 12 7
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5-Minute CheckSolve each equation using the inverse operation.
1. 5 + r = 12 7
2. 34 = 2s
8/13/2019 Pre-Algebra Lesson 1.9
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5-Minute CheckSolve each equation using the inverse operation.
1. 5 + r = 12 7
2. 34 = 2s 17
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8/13/2019 Pre-Algebra Lesson 1.9
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5-Minute CheckSolve each equation using the inverse operation.
1. 5 + r = 12 7
2. 34 = 2s 17
3. 7 = g/12 84
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5-Minute CheckSolve each equation using the inverse operation.
1. 5 + r = 12 7
2. 34 = 2s 17
3. 7 = g/12 84
4. 4.37 = y9.32
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5-Minute CheckSolve each equation using the inverse operation.
1. 5 + r = 12 7
2. 34 = 2s 17
3. 7 = g/12 84
4. 4.37 = y9.32 13.69
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5-Minute CheckSolve each equation using the inverse operation.
1. 5 + r = 12 7
2. 34 = 2s 17
3. 7 = g/12 84
4. 4.37 = y9.32 13.695. Astronomers keep track of about 7000 objects. One
out of every ten of these is a satellite. The rest are
space trash. About how many satellites are
astronomers tracking?a. Define a variable.
8/13/2019 Pre-Algebra Lesson 1.9
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5-Minute CheckSolve each equation using the inverse operation.
1. 5 + r = 12 7
2. 34 = 2s 17
3. 7 = g/12 84
4. 4.37 = y9.32 13.695. Astronomers keep track of about 7000 objects. One
out of every ten of these is a satellite. The rest are
space trash. About how many satellites are
astronomers tracking?a. Define a variable. s = satellites
8/13/2019 Pre-Algebra Lesson 1.9
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5-Minute CheckSolve each equation using the inverse operation.
1. 5 + r = 12 7
2. 34 = 2s 17
3. 7 = g/12 84
4. 4.37 = y9.32 13.695. Astronomers keep track of about 7000 objects. One
out of every ten of these is a satellite. The rest are
space trash. About how many satellites are
astronomers tracking?a. Define a variable. s = satellites
b. Write an equation.
8/13/2019 Pre-Algebra Lesson 1.9
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5-Minute CheckSolve each equation using the inverse operation.
1. 5 + r = 12 7
2. 34 = 2s 17
3. 7 = g/12 84
4. 4.37 = y9.32 13.695. Astronomers keep track of about 7000 objects. One
out of every ten of these is a satellite. The rest are
space trash. About how many satellites are
astronomers tracking?a. Define a variable. s = satellites
b. Write an equation. 10s = 7000
8/13/2019 Pre-Algebra Lesson 1.9
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5-Minute CheckSolve each equation using the inverse operation.
1. 5 + r = 12 7
2. 34 = 2s 17
3. 7 = g/12 84
4. 4.37 = y9.32 13.695. Astronomers keep track of about 7000 objects. One
out of every ten of these is a satellite. The rest are
space trash. About how many satellites are
astronomers tracking?a. Define a variable. s = satellites
b. Write an equation. 10s = 7000
c. Solve for the number of satellites.
8/13/2019 Pre-Algebra Lesson 1.9
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5-Minute CheckSolve each equation using the inverse operation.
1. 5 + r = 12 7
2. 34 = 2s 17
3. 7 = g/12 84
4. 4.37 = y9.32 13.695. Astronomers keep track of about 7000 objects. One
out of every ten of these is a satellite. The rest are
space trash. About how many satellites are
astronomers tracking?a. Define a variable. s = satellites
b. Write an equation. 10s = 7000
c. Solve for the number of satellites. 700
8/13/2019 Pre-Algebra Lesson 1.9
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5-Minute CheckSolve each equation using the inverse operation.
1. 5 + r = 12 7
2. 34 = 2s 17
3. 7 = g/12 84
4. 4.37 = y9.32 13.695. Astronomers keep track of about 7000 objects. One
out of every ten of these is a satellite. The rest are
space trash. About how many satellites are
astronomers tracking?a. Define a variable. s = satellites
b. Write an equation. 10s = 7000
c. Solve for the number of satellites. 700
d. Check your solution.
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1-9 Inequalities
< >
less than
fewer than
greater than
more than
exceeds
less than orequal to
no more
thanat most
greater thanor equal to
no less than
at least
Inequality symbols
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1-9 Inequalities
Example
For the given value, state whether each inequality is
true or false.
a. x7 > 16, x = 15
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1-9 Inequalities
Example
For the given value, state whether each inequality is
true or false.
a. x7 > 16, x = 15157 > 16
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1-9 Inequalities
Example
For the given value, state whether each inequality is
true or false.
a. x7 > 16, x = 15157 > 16
8 > 16
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1-9 Inequalities
Example
For the given value, state whether each inequality is
true or false.
a. x7 > 16, x = 15157 > 16
8 > 16
This sentence is false.
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1-9 Inequalities
Example
For the given value, state whether each inequality is
true or false.
a. x7 > 16, x = 15157 > 16
8 > 16
This sentence is false.
b. 16 2h/12+ 11, h = 24
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1-9 Inequalities
Example
For the given value, state whether each inequality is
true or false.
a. x7 > 16, x = 15157 > 16
8 > 16
This sentence is false.
b. 16 2h/12+ 11, h = 24
16 2*24/12+ 11
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1-9 Inequalities
Example
For the given value, state whether each inequality is
true or false.
a. x7 > 16, x = 15157 > 16
8 > 16
This sentence is false.
b. 16 2h/12+ 11, h = 24
16 2*24/12+ 11
16 4 + 11
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1-9 Inequalities
Example
For the given value, state whether each inequality is
true or false.
a. x7 > 16, x = 15157 > 16
8 > 16
This sentence is false.
b. 16 2h/12+ 11, h = 24
16 2*24/12+ 11
16 4 + 11
16 15
8/13/2019 Pre-Algebra Lesson 1.9
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1-9 Inequalities
Example
For the given value, state whether each inequality is
true or false.
a. x7 > 16, x = 15157 > 16
8 > 16
This sentence is false.
b. 16 2h/12+ 11, h = 24
16 2*24/12+ 11
16 4 + 11
16 15
This sentence is true.