That would be the rocky and appalachians
D. they are all goals of sustainable design
Answer:
x=4
Explanation:
since it is an isosceles triangle, line x splits the base into 2 equal parts.
using a smaller triangle we know the sides are 5,3,x
now use Pythagorean theorem
![5=\sqrt{x^{2} +3^{2} }](https://tex.z-dn.net/?f=5%3D%5Csqrt%7Bx%5E%7B2%7D%20%2B3%5E%7B2%7D%20%7D)
![x=\sqrt{5^{2}-3^{2} }](https://tex.z-dn.net/?f=x%3D%5Csqrt%7B5%5E%7B2%7D-3%5E%7B2%7D%20%20%7D)
x = ![\sqrt{16}](https://tex.z-dn.net/?f=%5Csqrt%7B16%7D)
x = 4, -4
since length cannot be negative, x = 4
There are between 189 and 196 countries in the world. This number is not fixed as some territories claim that they are countries, but are not widely recognized as such.