Answer:
the unknown side of the triangle is 
Step-by-step explanation:





or 
The answer to this would be complementary angles.
Answer:
C
Step-by-step explanation:
-3+12 = 9
-12+3 = -9
-6+6 = 0
6+6 = 12
Answer:
A table?
Step-by-step explanation:
fingers crossed this is right
Answer:
3.3 recurring
Step-by-step explanation:
1) expand bracket
11-3a+6=27
2)rearrange equation
11+6=27+3a
11+6-27=3a
17-27=3a
-10=3a
-10/3=a
a=3.3 recurring