Solving equations that involve formulas.

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Presentation transcript:

Solving equations that involve formulas.

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

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.

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.

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.