Answer:
5.6x+1.4
Step-by-step explanation:
(-3.5x+1.7)+(9.1x-0.3)=-3.5x+9.1x+1.7-0.3=5.6x+1.4
17.6°
1.8x-8=-14.4
-14.4 + 32= 17.6°C