Answer:
12
Step-by-step explanation:
Im not sure about equation 1 because theres a 3 after the y and i dont know if that was an error but if it was and its actually meant to read : y=2x+1 then equation 1 &2 are both linear functions.
Triangle formula: 1/2base(height)
So 1/2(6) * 9
3*9 = 27ft^2
Parallelogram formula: length(width) or base(height)
So 18(13)= 234m^2
Triangle formula above so 1/2(20)*9
So 10*9 = 90in^2
It would be 50 an acute angle is always under 50 atleast
