Igot these wrong, someone show me how to solve these !

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

What is the length of the missing leg in this right triangle? 18 mm 24 mm 26 mm 32 mm

Acredit card advertises an annual interest rate of 23%. what is the equivalent monthly interest rate?