Hey what number do you need help with
Answer:
C
Step-by-step explanation:
Legs are the sides of an isosceles triangle that aren't the base, so in this case ZX would be the base. This rule is only for isosceles triangles. It doesn't apply to any other type of triangle.
Hope I helped, sorry if I'm wrong!
~Mschmindy
(104+137+154+131+x) / 5 = 130
The calculation part I would like to leave it for you. It's a good practice.
Answer:

Step-by-step explanation:
5x4+20x3-105x2
5x2( x^2 +4x -21)

Answer: The next step will be 2x - 1 = 9
Step-by-step explanation:
4x -1 = 2x + 9
-2x -2x
2x -1 = 9
+1 +1
2x= 10
x= 5