Answer:
2/3
Step-by-step explanation:
if we divide 10 by 3 then we get 3.3 repeating so just use the fraction 1/3. if you use 2 of the divided lengths then you get 2/3
5
plug 3 into x
2(3)^2+(3)
2(9)+3
18+3
21
f(3)=21