The length of the hypotenuse of a 30 -60 -90 triangle is 11, find the perimeter ?

Ineed if you could explain and give me the answer you! this needs done

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}

1) what is the measure of the exterior angle, ∠uvw ? 2) in triangle man, what is the measure of the exterior angle at n (in degrees)?