Question

I need help on this I've been on the same one for hours straight

Answer 1

The "upper left" angle (let's call it angle "a") would = 90 -31 =
59 degrees.
Tangent ("a") = 400 / y
y = 400 / Tangent (59)
y = 400 / 1.6643
y = 240.3412846242