Answer:

Step-by-step explanation:


Answer: 21
Step-by-step explanation: 84/4 = 21
Answer:
the total of angle's in traingle is 180
so 85+53+c=180
c=180-138
c=42
Answer:
3 is not a function because you cant have the same input with different outputs
4 is a function because each input has one output
Step-by-step explanation: