What is the next logical statement in the proof below?
given: m is the midpoint of ab
prove: 2(am) = ab
a) am+am=ab
b) am=ab-mb
c) ab=am+mb
d) m (a+b)=ab

Ashley spent half of her lunch money on a turkey sandwich. then she spent two-thirds of the money she had left on a bottle of juice and the rest of the money on a cookie. if the cookie cost $.75, how much lunch money did ashley have to start with?