The perimeter of a figure is the sum of its side lengths. This gives us the following formula for the perimeter of our triangle.
( 7x+8) + ( 9x-4) + ( 6x+6)
Let's simplify this expression.
& 7x+8
&+ 9x-4
&+ 6x+6
& 22x + 10
The linear expression of the perimeter in a simplest form is 22x+10 millimeters. We want to find the value of the perimeter if x is 10 millimeters. Let's substitute 10 for x into our linear expression and simplify.
