The first and last choices are the only ones whose angles total 180 degrees, so they're the only possible triangles.
Answer:

Step-by-step explanation:
We will be using 2 properties of radicals in this simplification (outlined below).
<em>Let's simplify this:</em>

First answer choice is right.
Answer:
x=1 if that's 15 x
Step-by-step explanation:
The answer is |10| absolute value CANT be negative so it is 10
Answer:
All the exponents in the algebraic expression must be non-negative integers in order for the algebraic expression to be a polynomial. As a general rule of thumb if an algebraic expression has a radical in it then it isn't a polynomial
so no its not.