Chapter 2.2, Problem 2G

If we wanted to know the cost of a 7-mile cab ride, we could replace the variable m, which represents miles, with the number 7; the result would be $\mathrm{C\; <mo>\; =\; <mn>\; 2\; <mo>\; +\; <mn>\; 2.50\; <mrow>\; <mo>\; (\; <mn>\; 7\; <mo>\; )\; </mo>\; </mn>\; </mo>\; </mrow>\; </mn>\; </mo>\; </mn>\; </mo>}$. Finding the value of the calculation to the right of the equal sign will tell us the cost. We call this evaluating the expression (or formula) for cost. Find the cost of the 7-mile cab ride.