Answer:
Hi how are you doing today Jasmine
f=15
Step-by-step explanation:
set 2.5 over 1 to make it a fraction and cross multiply
110°
128°+40°+82°+x°= 360°
so 250°+x°=360°
x°=360°-250°
x°=110°
the answer is 81 over 280
i-
