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Evaluating Expressions

Evaluating Expressions. Real World Examples Page 2 & 4 in Practice Workbook. Page 2, #22. A side table has interior storage space in the shape of a cube. What is the volume of the storage space if the interior length is 12 inches? V = Bh V = lwh V = (12)(12)(12) V= 1728. Page 2, #23.

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Evaluating Expressions

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  1. Evaluating Expressions Real World Examples Page 2 & 4 in Practice Workbook

  2. Page 2, #22 A side table has interior storage space in the shape of a cube. What is the volume of the storage space if the interior length is 12 inches? V = Bh V = lwh V = (12)(12)(12) V= 1728

  3. Page 2, #23 There are 52 playing cards in a standard deck of playing cards. You are combining decks of cards so that you can play ba game with a large number of people. The expression 52d represents the number of cards in d decks. If you combine 4 decks of cards, ow manu cards will you have all together? 52d 52(4) = 208 cards

  4. Page 2, #24 An item costs c dollars and 6% sales tax is charged. The total cost including sales tax is given by the expression 1.06c. You are buying a skateboard that costs $75. What is the cost of the skateboard including sales tax? 1.06c 1.06 (75) = $79.50

  5. Page 4, #24 Three weeks ago, an art supply bstore started selling a paint kit for 75% of the original price. Now the kit is 15% off of the sale price. The expression .75x – 0.15(0.75x) represents the current price of the paint kit where x is the kit’s original price (in dollars). Find the current price if the kit originally cost $48

  6. Page 4, #24 (continued) .75x – 0.15(0.75x) .75 (48) – 0.15(0.75)(48) 36 – 5.4 30.6 Since this is money, we say $30.60

  7. Page 4, #25 You are decorating the perimeter of the ceiling of your living room with crown molding. The expression 2x + 2y represents the total amount of molding you need where x is the width of the room (in feet) and y is the length of the room (in feet). Find the total amount of wood you need if the room is 11 feet wide and 10.5 feet long.

  8. Page 4, #25 (continued) 2x + 2y 2(11) + 2 (10.5) 22 + 21 43 inches

  9. Translating Now, let’s look at translating verbal phrases into expressions

  10. The difference of 9 and a number n9 - n

  11. 25 more than twice a number m 2m + 25

  12. Words for Operators We discovered that many different words are used to indicate operations.

  13. Brainstorm as a class !! Record all of your responses.

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