For number 9. its 34 × 65 = 65 × 34.. So that means its communicative property
3c=123c=12
We move all terms to the left:
3c-(123c)=0
We add all the numbers together, and all the variables
-120c=0
c=0/-120
c=0
You can't make a triangle with those lengths for sides.
The way I look at it is like this:
-- Take 2 sticks ... lengths 4 and 2 ... and connect them together at one end.
-- The farthest they can reach, if they're opened up completely and pointing
in opposite directions, is a distance of 6 .
-- They can't reach the ends of a stick that is 7 long. So you can't make
a triangle with those 3 sticks.
F(x) = 2x +1.
Where x is the xth hour.
Therefore the 6th hour, x=6.
f(6) = 2*(6) +1
= 12 +1
=13. 13 Customers.
Cheers.