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H OMEWORK Q UESTIONS

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H OMEWORK C HECK Homework Check!

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E VALUATING E XPRESSIONS Lesson 1.3

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L EARNING T ARGETS 1. To evaluate variable expressions 2. To solve problems by evaluating expressions

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E VALUATE To evaluate a variable expression, you first replace each variable with a number. Then, you use the order of operations to simplify.evaluate

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E XAMPLE Evaluate 4 y 15 for y = 9.

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N OTE P AGE E XAMPLE Evaluate 18 + 2g for g = 3

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P RACTICE (note page quick check #1) Evaluate 63 – 5 x, for x = 7 Evaluate 4( t + 3) + 1, for t = 8

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E XAMPLE – N OTE P AGE Sometimes expressions have more than one variable.

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P RACTICE – Q UICK C HECK

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E XAMPLE Energy drinks come in cases of 24 bottles. Write a variable expression for the number of cases a store should order to get b bottles of energy drinks. Evaluate the expression for 120 bottles.

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P RACTICE The store in Example 3 pays $29 for each case of energy drinks. Which choice shows a variable expression for the cost of c cases and shows the cost of five cases?

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E XAMPLE The Omlete Café buys cartons of 35 eggs. a) Write a variable expression for the nymber of cartons the café should buy for x eggs. b) Evaluate the expression for 180 eggs.

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P RACTICE The One Pizza resteraunt makes only one kind of pizza, which cost $16. The delivery charge is $2. Write a variable expression for the cost of having pizzas delivered. Evaluate the expression to find the cost of having five pizzas delivered. Table Expression

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Q UICK C HECK The Omelet Café pays $21 for each case of bottled water. Write a variable expression for the cost of c cases. Evaluate the expression to find the cost of 5 cases.

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I N C LASS P RACTICE Light-year Handout

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H OMEWORK Pg. 16 & 17 (7-26, 29, 30, 31)

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