1. p=7.50+5.50v
p is the total price, v is the amount of visitors
For 6 visitors, it is $40.50
2. p=100+15x
p is the total price, x is the amount of dinner served
For 20 guests, it is $400
3.c=4.25+3.5p
c is the total cost, p is the amount of additional pecks you choose
For 3 pecks, it is $14.75
