Jim is going to buy donuts for his family each donut cost a $45 if the number of doughnuts Jim Bice is represented using the letter D which expression represents the total cost

of the donuts

45D

The expression that represents the total cost of the donuts Jim buys is:

Total cost = D * $45

The total cost of the donuts can be represented using the expression 45D. To get this expression, you simply need to multiply the cost per donut ($45) by the number of donuts Jim buys (D).