Okay so you can divide 7 by 2 which would equal 3.5 which is the same as $3.50. So let's focus on the apples first Joe can buy 3 apples with 50 cents left over. Next the bananas 0.75 you can divide 0.75 and 3.50 to see how many bananas he can buy but since we have 50 cents extra you can add that to 3.50 which adds to $4.00 . So 0.75 divided by 4.00 is 5.3 which can be rounded to 5 bananas. So Joe can buy 3 apples and 5 bananas.
hope that this helped you (;