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Do Now 9/7/10
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Copy HW in your planner.
 Text
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p. 5-7, #4-52 multiples of 4
In your journal, answer the following question.
How do you evaluate algebraic expressions and
powers? Then solve the example, when n = 4.
14  n
Objective
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SWBAT evaluate algebraic expressions
and use exponents
Section 1.1 “Evaluate Expressions”
VARIABLE
a letter used to represent
one or more numbers.
To EVALUATE AN
ALGEBRAIC EXPRESSIONsubstitute a number for each
variable, perform the operations
and simplify, if necessary.
13 n = 13 3
= 39
Substitute 3 for n.
Multiply.
Evaluate the expression when n = 3.
a.
b.
9
n
= 9
3
Substitute 3 for n.
= 3
Divide.
n–1 = 3–1
= 2
Substitute 3 for n.
Subtract.
Evaluate the expression when y = 2.
c. 6 y
= 6 2
= 12
Substitute 2 for y.
Multiply.
d. y + 4
= 2+4
= 6
Substitute 2 for y..
Add.
POWER
an expression that represents
repeated multiplication.
2
4
EXPONENT
BASE
Product
 2222
Words
two to the
fourth power
GUIDED PRACTICE
Evaluate the expression.
1.
x3 when x = 8
1.
2. k3 when k = 2.5
x3 = 83
=8 8 8
= 512
3.
d4 when
2. k3 = 2.53
= (2.5)(2.5)(2.5)
= 15.625
3.
d4 =
1
3
4
( )
1
=
3
= 1
81
1
3
1
3
1
3
d=
1
3
Homework
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Text p. 5-7, #4-52 multiples of 4
D105 Classroom Scavenger Hunt