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EXAMPLE 1 PowerPoint PPT Presentation


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Music. You buy a used guitar for $50 . You then pay $10 for each of five guitar lessons. The total cost can be found by evaluating the expression 50 + 10 5 . Is the total cost $100 or $300 ?. EXAMPLE 1. Following Order of Operations. To find the guitar costs described, evaluate

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EXAMPLE 1

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Music

You buy a used guitar for $50. You then pay $10 for each of five guitar lessons. The total cost can be found by evaluating the expression 50+105. Is the total cost $100 or $300?

EXAMPLE 1

Following Order of Operations


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To find the guitar costs described, evaluate

50+105.

50+105

=

100

ANSWER

The total cost is$100.

EXAMPLE 1

Following Order of Operations

=50+50

First multiply 10 and 5.

Then add 50 and 50.


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Evaluatex3y3whenx=25andy=2.

= 25 3(23)

x 3y3

=

253(8)

=

2524

=

1

EXAMPLE 2

Evaluating a Variable Expression

Substitute25forxand2fory.

Evaluate the power.

Multiply8and3.

Subtract24from25.


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1.

2.

3.

5 +6 5

20 422

10 3+ 33

ANSWER

ANSWER

ANSWER

35

12

57

for Examples 1 and 2

GUIDED PRACTICE

Evaluate the expression.


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4.

Evaluatea+4b2whena=6andb=5.

ANSWER

106

for Examples 1 and 2

GUIDED PRACTICE


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