Answer:
The puzzle is first add the current two numbers and then add their sum to result obtained in previous step.
Step-by-step explanation:
1 + 4 = 5
2 + 5 = 12
12 is obtained by adding 2 + 5 = 7 and adding the result obtained in previous result which is 5 to 7
⇒ 7 + 5 = 12
Now, 3 + 6 = 21
21 is obtained by first adding 3 + 6 = 9 and the previous result obtained is 12
So adding 12 to 9 ⇒ 12 + 9 = 21
Hence, The puzzle is first add the current two numbers and then add their sum to result obtained in previous step.
Answer:

Step-by-step explanation:
−2|x| < −8 ↷
−2x > 8 −2x < −8
___ __ ___ ___
−2 −2 −2 −2
OR 
Whenever you multiply\divide by a <em>negative</em>, you reverse the inequality symbol.
I am joyous to assist you anytime.
If you would like to solve 36 - 0.0048, you can calculate this using the following step:
36 - 0.0048 = 35.9952
The correct result would be A. 35.9952.
Supplementary angles.
This is because supplementary angles are two angles that add up to 180 degrees, and these two angles would add up to 180 degrees.
Answer:
21
Step-by-step explanation:
because