<p>Trinity allows incoming freshman to use AP exams to cover 2 credits towards graduation. A lot of people use that as Math 31, 32 (Calculus). Multivariable will give him placement out of Math 102 or 103 and Linear Algebra will give him placement out of Math 104. This is assuming these classes are not college credit. If its college credit your son would get credit and placement. Most likely he could take Differential Equations or Statistics. He has all the hard math he needs for an Econ major, but simply needs some Stats courses to take upper level Econ courses.</p>