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Tiffany's phone company charges eight cents per minute of talk time plus a monthly service fee of $5.95. If her phone bill last month was $17.15, how many minutes did she talk on the phone?

Respuesta :

We can translate this question as follows:

[tex]0.08x+5.95=17.15[/tex]

Then, we need to solve the equation for x (number of minutes):

[tex]0.08x=17.15-5.95\Rightarrow0.08x=11.2\Rightarrow x=\frac{11.2}{0.08}\Rightarrow x=140[/tex]

Therefore, Tiffany talked on the phone for 140 minutes.

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