Wait is there any other information?
Answer:
they each get $5.75 for lunch
Step-by-step explanation:
9.25 x 90 students = 832.50
832.50 -315 = 517.50
517.50 / 90 = 5.75
First, we know that their are 419 students....and that each needs 4 ribbons.
419*4 = 1676
Now, we also need to add the 48 ribbons for the parents.
1676 + 48 = 1724
Now, in total, Mr. wolf needs 1,724 ribbons.