Answer:
didn't even ask a question
Step-by-step explanation:
impossible to answer without a question
Answer:
70
Step-by-step explanation:
By exterior angle theorem:

If you're asking for the model for the second problem (I didn't see any unsolved), here it is!
One equivalent fraction for 4/21 could be 8/42.
Answer: -7 is the answer
Step-by-step explanation:
4(2)+3(2-7)
2-7 is -5
-5 times 3 is -15
4 times 2 is 8
-15+8=-7