Joseph is playing a game. he started with 15 points. in the first round he lost 30 points. in the second round he won 25 points. in the third round he lost 15 points. write and solve an expression to show the change in joseph’s score.

30-15=15+25-15=40-25 i think.

you have to add all the points he won and all the points he lost not toghether separatly then subtract all the points he lost from the ones he won

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