Answer:
13.7142857143
Step-by-step explanation:
so just 13
Answer:
Given that:
and 
if a , a+ commutator, it obeys 
First find:

= 
Now;

=
therefore,
which implies the operators a and a+ are commutators.
Answer:
Obtuse
Step-by-step explanation:
Right = has angle measure of 90°
Acute = has angle measure less than 90°
Equilateral = 2 or more angles whose angle measures are congruent to others
Circle = measures 360°
<u>Obtuse = Angle measure greater than 90° and less than 180°</u>
Hope this helps!
Answer:
(b-5)(b+6)=0
Step-by-step explanation:
i call it "reverse FOIL"