Solving Variable Expressions

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Solving Variable Expressions
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Expressions

• no equals sign
• uses variables and numbers to model a situation
• use the order of operations to simplify

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Example 1

• Write expressions for the perimeter and the area
  of the rectangle

3x5
x
4
Example 2

• Evaluate each expression if m 4, n -3, and t
  0
• 2m 3(4n)3
• (5n3 2s7)t
• 9m 4m2 m2 m 5n2

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Example 3

• Write an expression for the perimeter of

n
3n
n
n
6
Example 4

• Write an expression for the area of

n
3n
n
n
7
FOIL

• Use when multiplying a binomial times a
  binomial
• multiply the first term times the first term
• multiply the outer terms
• multiply the inner terms
• multiply the last terms
• add like terms (from the outer inner)

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Example 5

• Write an expression for the area of

2x 5
x - 1
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Homework

• Purple Book
• p. 91-92 1-18