Answer:

Step-by-step explanation:
Equation: 
1).
→
2).
∴ 
3). 

4). now plug
into 


5). Minimum (0,-5) ∴ 
Answer:
Step-by-step explanation:
(2x+4)° + 42° = 180°
x = 67°
The answer is 6 cause 9-5 is 4 and 20/4 equal 5+1 equal 6
Answer:
the diameter is 1
Step-by-step explanation:
Since C = pi*d, solving for d would give 1