Philip P. answered • 01/21/15

Effective and Patient Math Tutor

Use a proportion:

$5 $x

------- = -------

250 300

Cross multiply (means and extremes):

$5*300 = 250*x

1500 = 250x

1500/250 = x

**$6 = x**

Raquel R.

asked • 01/21/15A cell phone company charges $5 for 250 text messages. How much does the company charge for 300 text messages?

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Philip P. answered • 01/21/15

Effective and Patient Math Tutor

Use a proportion:

$5 $x

------- = -------

250 300

Cross multiply (means and extremes):

$5*300 = 250*x

1500 = 250x

1500/250 = x

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