4. A certain psychologist charges $30 more for the first hour of therapy than for each additional hour. If the total charge to a patient who receives 6 hours of therapy is $300, what is the total charge to a patient who receives only 3 hours of therapy ?
x+30 + 5x =300 (its 5x b/c we already have one hour in x+30)
x+30 +2x=? 75+90=165
def. avoid the "obvious" answer of C here.