The equation C=mx+b can be used to model the monthly cost, C, of a cell phone plan where b is the flat monthly cost, m represents the cost in dollars per minute and x is the number of minutes used in the month. Choose a flat monthly rate and cost per minute and insert the values you have chosen for m and b into the equation. Then use this equation to find the total monthly cost, C, if 73 minutes are used.
C=.25(73)+B
C=18.25+80.00
C=$98.25 Monthly
The monthly cell phone costs are $98.25.
Is this what you wanted or something else?
Not what I wanted, but it fulfills the requirements of the problem.
To find the total monthly cost, C, using the equation C=mx+b, we need to choose values for m and b, and then substitute the values into the equation.
Let's say we choose a flat monthly rate of $30 (b = $30) and a cost per minute of $0.20 (m = $0.20).
Substituting these values into the equation, we have C = ($0.20)(73) + $30.
To calculate the total monthly cost, we simply multiply the cost per minute (m) by the number of minutes used (x = 73), and then add the flat monthly cost (b).
C = ($0.20)(73) + $30
C = $14.60 + $30
C = $44.60
Therefore, the total monthly cost (C) of the cell phone plan, if 73 minutes are used, is $44.60.