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31 October, 19:50

Your Mobil phone company bill is $35.95 per month plus $0.20 per text message. What is the rate of change? What is the initial value? Write an algebraic equation that wold model your total monthly cost c for any number of t text messages. Use your equation to find the cost in a month with 225 text messages?

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  1. 31 October, 20:52
    0
    x = number of text messages sent

    0.2x+40=50

    0.2x = 10

    5 (0.2x) = 5 (10)

    x = 50
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