Answer:
1st Option
Step-by-step explanation:
All angles in a triangle must add up to 180°.
Step 1: Set up equation
40° + 60° + 16x = 180°
Step 2: Rewrite
60° + 16x + 40° = 180°
The change in temperature for 1 hour would be -5. hope this helps.
#10:
15·12=180
180÷3=60
60·22=1,320
