A cell phone provider offers a plan that costs $30 per month plus $0.10 per text message sent or received. A comparable plan costs $40 per month but offers unlimited text messaging. Complete parts a. and b. below.
a) Write an equation that represents the cost (C) after sending or receiving x text messages for the first plan.
The cost for sending or receiving x text messages in the first plan is given by the equation:
C = $30 + $0.10x
b) Write an equation that represents the cost (C) after sending or receiving x text messages for the second plan.
The cost for sending or receiving x text messages in the second plan is a fixed cost of $40 per month, regardless of the number of text messages sent or received. Therefore, the equation is simply:
C = $40