Alg2 sections 1.4-1.5

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Alg2 sections 1.4-1.5

  1. 1. Rewrite Formulas and Equations Section 1.4
  2. 2. Formulas  Distance  Temperature  Area of a triangle  Area of a rectangle  Perimeter of a rectangle  Area of a trapezoid  Area of a circle  Circumference of a circle
  3. 3. Solving for a variable 
  4. 4. Solving for a variable 
  5. 5. Try these  
  6. 6. Application  A college bookstore sells t-shirts for 15,000w each and sweatshirts for 22,000w each.  Write an equation for the bookstore’s revenue R from selling m t-shirts and n sweatshirts.  Solve the equation for m.  If they sell 150 sweatshirts, how many t- shirts and must they sell to have 6,660,000w in revenue?
  7. 7. Use Problem Solving Strategies and Models Section 1.5
  8. 8. Strategies 
  9. 9. Strategies Formula  The driving distance between Daegu and Seoul is about 295 km. If you drive this trip in a total of 3.5 hours, what is your average speed? Round to the nearest km.  84 km/hour
  10. 10. Strategies  Patterns  This table shows the height h of a paramotorist t minutes after beginning a descent. Find the height after 7 minutes. Time (min) t 0 1 2 3 4 Height (ft), h 2000 1750 1500 1250 1000
  11. 11. Strategies Draw  You want to tape five posters on a wall so that the spaces between posters are the same. You also want the spaces at the left and the right of the group of the posters to be three times the space between any two adjacent posters. The wall is 15 feet wide and the posters are 1.5 feet wide.  Draw a diagram and then write and solve an equation to find how to position the posters.
  12. 12. Homework  Pages 30-32  #7-15 odd, 18-20 all, 21-25 odd, 29-31 odd, 35  Pages 37-40  #11-14 all, 25-33 odd

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