Answer:
The ratio is 1:3
Step-by-step explanation:
Let
x -----> the number of tables in the restaurant
y ----> the number of chairs in the restaurant
we know that
To find out the ratio of tables to chairs in the restaurant, divide the number of tables by the number of chairs
we have

so
The ratio is equal to

Simplify
Divide by 18 both numerator and denominator

therefore
The ratio is 1:3
So the number of orders in is y=x+2, and going out is y=2x-1. The solution, which is x=3, represents when the number of order in is the same as the number of order out.
Answer:
F(x)=x-2
Step-by-step
This ones more complicated, but its that because the start is at -2, and its going one,
D 7/4
Also review how to find the LCD and rember that a negitive times a neg make a positive!