Answer:
x²+1 is the second
Step-by-step explanation:
2x+24=40°
4x+43=75°
x²+1=65°
(2x+24) + (4x +43) + (x²+1)=180
x²+6x+68=180
x1=-14
x2=8
since there's no negative angle, we'll use x=8
6/9
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-8
-4 x 8 = -32
8 x 3 = 24
-32 + 24 = -8
Hope this is right and helps!