Answer:
Standard form: 
This equation represents the circle with the center at the point
and the radius 
Step-by-step explanation:
Consider expression 
First, form perfect squares:

This equation represents the circle with the center at the point
and the radius 
Answer:
9/7
Step-by-step explanation:
13/14 - 1/7 + 1/2
taking LCM
=(13-2+7)/14
=18/14
to its lowest term
=9/7
Like terms are when numbers with and without variables can be combined. ex: 4x+6-8x+=32
you would first combine 4x and -8x because they are the same.
What kinda of math is this so i can answer..
:)