A senior class saves money for the school prom. The class currently has $400 saved and wants a total of $7,600 for the prom. The class saves $80 each day. Part A: Which equation can be used to determine the number of days, d, it will take the class to reach its goal? Subtract the following expressions: 5a + 3y − 6c and 2a − 4y − 13c