Respuesta :
Answer:
Perimeter of triangle =40 feet
Step-by-step explanation:
Given:
Lengths of edges of triangle:
[tex](3x-4)[/tex] feet
[tex](x^2-1)[/tex] feet
[tex](2x^2-15)[/tex] feet
Perimeter of the triangle= Sum of all sides = [tex](3x-4)+(x^2-1)+(2x^2-15)[/tex] feet
On simplifying by adding like terms:
Perimeter of triangle = [tex]3x^2+3x-20[/tex] feet
Given [tex]x=4[/tex]
∴ Perimeter of triangle = [tex]3(4)^2+3(4)-20[/tex] [tex]=3(16)+12-20[/tex]
[tex]=48+12-20[/tex] = 40 feet
