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Proportions

Proportions. Rates & Proportions. Mr. Nowak ran 200 meters in 45 seconds. At this pace, how long would it take him to run 1,600 meters?. Answer. meters 200 = 1,600 seconds 45 s Cross multiply 200●s = 1600●45 Solve for the variable (s) 200s = 72000

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Proportions

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  1. Proportions

  2. Rates & Proportions • Mr. Nowak ran 200 meters in 45 seconds. At this pace, how long would it take him to run 1,600 meters?

  3. Answer meters200 = 1,600 seconds 45 s • Cross multiply 200●s = 1600●45 • Solve for the variable (s) 200s = 72000 200 200 s = 360 seconds

  4. Rates & Proportions • A recipe that makes 48 oatmeal cookies calls for 2 eggs. How many cookies can be made with 5 eggs?

  5. Answer cookies48 = c eggs 2 5 • Cross multiply 2●c = 48●5 • Solve for the variable (c) 2c = 240 2 2 c = 120 cookies

  6. Rates & Proportions • In the first 8 games of the basketball season, Mr. Wood scored 48 points. At this rate, how many points would he score in 24 games?

  7. Answer games8 = 24 points 48 p • Cross multiply 8●p = 48●24 • Solve for the variable (p) 8p = 1152 8 8 p = 144 points

  8. Exit Ticket • In June 2009, Fisher Price is building a playground for Marilla Primary and spending will be about $4 million a day. At this rate, how long would it take to spend $100 million?

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