Which of the following could work as bits for a binary system?
A. The flip sides of a coin
B. The fingers on one hand
C. The days of the week
D. The colors of the rainbow

Afruit stand has to decide what to charge for their produce. they need $10 for 4 apples and 4 oranges. they also need $15 for 6 apples and 6 oranges. we put this information into a system of linear equations. can we find a unique price for an apple and an orange?