Acollege student needs 11 classes that are worth a total of 40 credits in order to complete her degree. the college offers both 4-credit classes and 3-credit classes. which system of equations can be used to determine f, the number of 4-credit classes the student can take to complete her degree, and h, the number of 3-credit classes? a) f + h = 40 4h + 3f = 11 b) f + h = 11 4h + 3f = 40 c) f + h = 40 4f + 3h = 11 d) f + h = 11 4f + 3h = 40