Answer:

Step-by-step explanation:
Answer:
A
Step-by-step explanation:
hope this helped!
Answer:
f(5)=4
Step-by-step explanation:
f(5)=5_1=4
.....
Answer:
45 degrees
Step-by-step explanation:
All triangles equal 180 degrees so your just add the two existing angles which gets you 135 then you do 180-135, therefore giving you 45