Write a model using standard form EXAMPLE 6 Online Music You have $30 to spend on downloading songs for your digital music player. Company A charges $.79.

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Presentation transcript:

Write a model using standard form EXAMPLE 6 Online Music You have $30 to spend on downloading songs for your digital music player. Company A charges $.79 per song, and company B charges $.99 per song. Write an equation that models this situation. SOLUTION Write a verbal model. Then write an equation.

Write a model using standard form EXAMPLE x y = 30 ANSWER An equation for this situation is 0.79x y = 30.

GUIDED PRACTICE for Example What If? In Example 6, suppose that company A charges $.69 per song and company B charges $.89 per song. Write an equation that models this situation. ANSWER An equation for this situation is.69x +.89y = 30.