Answer:
Step-by-step explanation:
Use exponent rule 
:
The number 1 goes at the end of the number line because it represents 1 whole. Hope this helps c;
15
3 x 5 or 5 x 3
35
5 x 7 or 7 x 5
So the answer is 5
Let's use a formula in order to find how much the interior angles are supposed to add up to.
(n-2)×180; n is the number of angles.
(5-2)×180= 3×180=540
We need for the interior angles to add up to 540. Let's make an equation.
100+102+108+121+x=540
431+x=540; let's find x.
540-431= 109
So, X= 109°
