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PREALGEBRA CHAPTER 1 SECTION 3

PREALGEBRA CHAPTER 1 SECTION 3. VARIABLES AND EXPRESSIONS:. GOAL: Evaluate expressions containing variables and translate verbal phrases into algebraic expressions. A variable is a letter used to be a place holder for any value. Examples of variables x, y, z.

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PREALGEBRA CHAPTER 1 SECTION 3

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  1. PREALGEBRA CHAPTER 1 SECTION 3

  2. VARIABLES AND EXPRESSIONS: GOAL: Evaluate expressions containing variables and translate verbal phrases into algebraic expressions. A variable is a letter used to be a place holder for any value. Examples of variables x, y, z An algebraic expression contains sums or products of variables and numbers. Examples: 3x + 52, 5y – 7, 6z + 8

  3. EVALUATING EXPRESSIONS: EXAMPLES: 5x + 9; for x = 6 3y – 7; for y = 5 2x + 3y – 11; for x = 7 and y = 2 6m – 4n; for m = 10 and n = 3 xy + 12; for x = 3 and y = 9

  4. TRANSLATE VERBAL PHRASES INTO EXPRESSIONS: EXAMPLES: Twelve points more than the dolphins scored. Four times a number increased by six. Seven times a number decreased by ten. Double a number increased by four.

  5. WORD PROBLEMS: Cornet Cable charges $32.50 a month for basic cable television. Each premium channel cost an additional $4.95 per month. Write an expression to find the cost of a month of cable service. What would it cost to have two premium channels? What would it cost to have five premium channels?

  6. HOMEWORK PAGE 19-20 {1-44}

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