12.
1: n•n= n^2
2: n•(-2)= -2n
3: 2•n= 2n
4: 2•(-2)= -4
=n^2-2n+2n-4
= n^2-4
Answer:
x = 8
Step-by-step explanation:
Triangle OBC is congruent to triangle OBA (SAS ---- side angle side)
Answer:
there is actually no pictures
can you requestion it
Answer: angle 5 is a 110 degree angle
explanation: angles 3 and 5 are same side interior angles, making them supplementary to each other
