Problem Solving and Using Formulas

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§ 1.5 Problem Solving and Using Formulas.

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Presentation transcript:

Problem Solving and Using Formulas Chapter 1 Section 5 Problem Solving and Using Formulas

Strategies Read the problem for understanding. Let x represent one of the unknown quantities 2) Write expressions for other unknown quantities in terms of x 3) Write an equation 4) Solve the equation and answer the question. 5) Check.

Example 3, page 58 The toll to a bridge cost $7. Commuters who use the bridge frequently have the option of purchasing a monthly discount pass for $30. With the discount pass the toll is reduced to $4. For how many bridge crossings per month will the total monthly cost without the discount pass be the same as the total monthly cost with the discount pass?

Solving a Formula for One of Its Variables Solve like an equation.

Solve for the variable h if C if F =

Formulas that you know? Area of a Rectangle Area of a Square Perimeter of a rectangle Perimeter of a square Area of a triangle Perimeter of a triangle

Solve a problem using a formula Page 68, # 43 The length of the rectangular tennis court at Wimbledon is 6 feet longer than twice the width. If the court’s perimeter is 228 feet, what are the court’s dimensions?