If the perimeter of the following triangle is 7x-2, what is the length of the unknown side?
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Let x- intercept represents time
Let y-intercept represents population
Let 1990 represent initial year
Points are (0,14.2)(10,12.4)
slope m=
=
General linear equation
y= mx+b --------------(i)
here m is slope and b is intercept
plug the 1st point in equation
14.2= -0.018(0) + b
b=14.2
y= 0.018x + 14.2
replace y with p(t) and x with t
p(t) = -0.018t + 14.2
If a is the number of events, then a = 1. Plugging in 1 for a in the equation 
, you get 
.
Total cost is $9.
Total cost is $9.