1. Solving equations that involve formulas.

2. A formula is an algebraic equation that relates two or more quantities.
Distance
distance = rate • time
______________
Perimeter
______________
triangle
A measure of the distance around a geometric figure.
______________
rectangle
Area
______________
rectangle
square units of the interior region of a two dimensional figure or the surface of a three dimensional figure.
______________
triangle

3. Example 1 Use a variable expression to find the distance traveled by a truck moving at an average speed of 65 miles per hour for 6 hours.
1.Write the formula.
2. Substitute.
3. Simplify.
4. Write a sentence.

4. Example 2 Find the perimeter of a triangle with two sides 5 miles long and one side 3 miles long.
1. Write the formula.
2. Substitute.
3. Simplify.
4. Write a sentence.

5. Example 3 Find the area of a triangle with base 15 centimeters and height 8 centimeters.
1. Write the formula.
2. Substitute.
3. Simplify.
4. Write a sentence.