Plenty help ASAP❗️❗️❗️

Adeli charges the same price, $5.50, for all of its different sandwiches. if a company ordered n sandwiches for a luncheon, which equation could be used to find the total price, p, that the deli charged for the sandwiches? a- n/5.50=p b-5.50n=p c-5.50/n=p d-5.50+n=p

Ill mark the brainliest if you me with the these three questions 7,8,9

Find the area of the regular hexagon if a side is 20 cm.