Answer: Look at explanation for the answer please, I am too exhausted to type the answer here
Explanation:
y = 10sqrt(5) from the pythagorean theorem
The angle opposing z is arctan(2)
So, find z by the equation
z/y = tan(arctan(2)) = 2
z = 20sqrt(5)
And finally, find x by the pythagorean theorem
x = sqrt(1600) = 40