Answer:
The addition that matches the problem is the first one.
Step-by-step explanation:
The red line goes back 8 so it is a -8 and the blue line goes forward 4 so it is a postive 4.
4 + (-8) = -4
It's 180-50-50=180-100=80°
Answer:
12f-5f²+6f+10f²= 10f²-5f²+12f+6f=5f²+18f
