The math department wants to sell pie slices to buy new math books. each pie was cut into six slices. two of the pies will be served to members of the department as courtesy. if there are a total of 48 pieces, how many whole pies will the department have available for sale? a. 8 pies b. 6 pies c. 4 pies d. 7 pies

We know that

Each pie was cut into six slices
there are a total of 48 pieces> divide by six to find the number of pies
48/6> 8 pies

Two of the pies will be served to members of the department as courtesy
so
subtract 2  to the total of pies  to find the pies available for sale 
whole pies available for sale=8-2> 6 pies

the answer is
6 pies