1. Formulas SWBAT use formulas to solve problems

2. Formulas  Formulas –a rule that describes a mathematical relationship involving two or more quantities.  Distance –d = r x t  Volume –V = l x w x h  Area –A = l x w  Perimeter –P = 2(l + w)

3. Examples  Use the distance formula to solve. d = r x t –A plane travels 2750 miles. If it flies at a rate of 500 miles per hour, how many hours does the plane fly? –r = 55 mph, t = 5 hrs, and d = ?.

4. Examples –Use the volume formula to solve. V = l x w x h  V = 12cm 3, l = 4m, w = 1.5m, and h=?  V = 75m 3, l = 5m, w = 5m, and h = ?

5. Examples  Use the perimeter formula to solve. P = 2(l +w) –l = 7yds, w= 4yds, and P=? –P = 48 cm, w = 6 cm and l = ?.

6. Examples  The perimeter of a square tile is 28m. What is its area?  Challenge –The length and width of a rectangle are doubled. Write a formula of the new area. How is the area changed

7. Try the problems on your paper  t = 3 hours  r = 65 km per hour  w = 47 ft  w = 9 cm  P = 208 ft 2  w = 2 m  volume = 272 cm 3