Compete the two column proof​

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?

One card is dealt from a 52 card deck. find the probability that the dealt card is a 4 or a black 7

Is the figure congruent? yes or no?