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Dec.3
- 2. Dates to Remember Wash Khan Academy Clothes Khan cut the Academy Grass
- 3. Warm-Up 1. Is thefollowing a proportion? Why or why not: 18/3 = 96/24 2. Solve: 3 + y = -y 4 6 3. Students at MHS go to school 180 out of the 365 days in a non leap year. What percent of the year is this?
- 4. 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 corresponding 144 = 3H positions in the proportion H = 48 The tree is 48 ft. tall 4
- 5. Are the RatiosProportions? Simplify to tell whether the ratios are equivalent.
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- 8. 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 in different 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 60 miles per 1 hour. In the above example, what is the Unit? What is the unit rate?
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- 11. Ratios Involving Measurement 1.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
- 13. . 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