(don’t answer just for points or i will report)

callens expression makes sense because they are showing that the five is negative and it is also being multiplied to the set of parenthesis.

demetrius's expression is a simplified version of callens. Using the parenthesis around the -5 shows that not only is that number negative, but it will also be multiplied to the -4 in the parenthesis.

Step-by-step explanation:

i hope this helps :)

to determine the unit cost your would divide the total cost by the number sold.

7 bagels for $4.41       $4.41/7 = $.63 each at fresh side

5 bagels for $3.60         $3.60/5 = $.72 each at value mart