Your number = X
2X+8=X+12
2X-X=12-8
X=12-8
Answer:
The unit rate is -1 store per year
Step-by-step explanation:
Let
x -----> the number of years since 1996
y ----> the number of video rental stores
we know that
The year 1996 represent x=0
so
2016 represent ----> x=2016-1996=10 years
we have the points
(0,10) and (10,1)
The unit rate is equal to the slope of the linear equation
<em>Find the slope m</em>

----> is negative because is a decreasing function
therefore
The unit rate is -1 store per year
6 burgers just do 3+3 and you get 6
= 18 x sin(20) = 6.15 rounded to 6.2