Correct. The system of equations that will solve this problem is

$\displaystyle{3}{c}+{4}{m}={24.25}\usepackage{cmbright}\Huge\$

$\displaystyle{6}{c}+{5}{m}={36.50}\usepackage{cmbright}\Huge\$

If a calzone costs $2.75 and a meatball sub costs $4.00, then both equations are true so it is the solution to the system.