1. Rewrite Formulas and
Equations
Section 1.4

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. Solving for a variable


4. Solving for a variable


5. Try these
 

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. Use Problem Solving
Strategies and Models
Section 1.5

8. Strategies


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. 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. 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. 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