Answer:
Hello! answer: 35
Step-by-step explanation:
If they can hold 40 on each shelve we can do 40 × 3 and 40 × 3 = 120 then just subtract by 85 to find how many the shelves can hold! So 120 - 85 = 35 so 35 is the answer Hope that helps!
13b
it simple a+b=ab
bc=bc+c
hope it helps