Answer: b and d (options 2 and 4)
Explanation:
36 photos divided amongst ? pages with 6 on each page means that
#1 (p=6*36) is incorrect
#2 (36=p*6) is correct since the number of pages times 6 should equal 36
#3 (p=36*6) is essentially the first option and therefore incorrect
#4 (p=36/6) is correct because 36 pictures divided with 6 pictures on each page will give you the amount of pages
FYI, the amount of pages is 6.