Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Dec.3

Related Audiobooks

Free with a 30 day trial from Scribd

See all
  • Be the first to comment

  • Be the first to like this

Dec.3

  1. 1. Dates to Remember Wash Khan AcademyClothes Khancut the Academy Grass
  2. 2. Warm-Up1. Is the following a proportion? Why or why not: 18/3 = 96/242. Solve: 3 + y = -y 4 63. Students at MHS go to school 180 out of the 365 daysin a non leap year. What percent of the year is this?
  3. 3. Proportions The shadow of a 4 ft. tall mailbox is 3 ft. long. If the shadow of a tree is 36 ft. long, how tall is the tree? height height = shadow shadow 4 H 3 = 36 You must be careful to place the same quantities in corresponding144 = 3H positions in the proportionH = 48The tree is 48 ft. tall 4
  4. 4. Are the Ratios Proportions?Simplify to tell whether the ratios are equivalent.
  5. 5. Unit Conversions
  6. 6. Ratios vs. Rates A ratio is the comparison of two different numbers.Solve: The basketball team won 7 games and lost 4 games. A. What is the ratio of wins to losses? B. What Percent of its games has the team won. (What is its win Percent?)In a ratio, if the numerator and denominator are measured indifferent units then the ratio is called a rate. You can travel 1200 miles on 60 gallons of gas. This rate is expressed as: 1200 miles/ 60 gal.A unit rate is a rate in which the second quantity is 1. Like 60miles per 1 hour. In the above example, what is the Unit? Whatis the unit rate?
  7. 7. Comparing Unit Rates
  8. 8. Ratios vs. Rates
  9. 9. Ratios Involving Measurement1. Express the ratio 6 feet to 15 inches as a fraction in simplest form.Six feet = 72 in. Simplify 72/15; the answer is 24/5*Change the larger unit to the smaller one. 3 pints = 6cups. The ratio is now 6 cups to 2 cups. Simplify to: 3/1
  10. 10. . Class Work: Pages 62-63: Odd/Even**Page 66: Odd; do 3, 5, 7 Even; do 4, 6, 8**Page 65: Odd; do 3, 5, 9 Even; do 2, 6, 8

×