Answer: x = 9.0
Step-by-step explanation:
You can use the law of sines on any triangle in the Euclidean plane. For this we will say the following
6.9 / sin(50) = x / sin(90)
And we know that the sin(90) = 1. So we really have:
6.9 / sin(50) = x
Put that in a calculator and you’ll get x = 9.007. Round that to the nearest tenth to get 9.0.
Cheers.