Math inequalities question?

Question

A restuarant has 25 tables. Some of the tables (x) are reserved, and the rest are available for walk-in customers. The restaurant never reserves more than 15 tables.
inequalities:_____________
vertices:________________

if anyone can help that would be wonderful! thanks!

Answer 1

x = reserved tables
y = walk-ins
x>= 0
y>= 0
x <= 15
y>= 10
x+y = 25

Vertices are (0,10), (0,25), (10,25)