Ok you answer is d , 6+(-15)
Answer:
83! :)
Step-by-step explanation:
It all equals 180.
So,
53+44+?=180
180-53-44=83! :)
83+53+44=180! :)

is an irrational number i.e. it cannot be written in the form of

where p and q are integers and q is never equal to 0.
By multiples of

, we can write like:
1

=

= 3.14
2

= 2*3.14 = 6.28
3

= 3*3.14 = 9.42
In the same way, any integer n when multiplied by

, is a multiple of