plz, help if u know how to do trigonometry, I am failing this class need to do this correctly to help get my grade up. any help would be appreciated

Honestly, I don’t take trigonometry, but I do know a little bit of the material that could help you.
Angle C is a square angle, meaning that it’s worth 90 degrees.
And it all the edges add up to 180, that means that the other two angles have to add up to ninety. It’s not 45 + 45, though, because angle B is smaller than angle A and that wouldn’t make any sense.
I know this wasn’t very helpful. Do you have a protractor lying around? Also, flipping the paper upside down (if needed) can sometimes give you a better mental picture.

Ok here we go ..there are plenty of ways to solve such math problems but we will go for the smartest and easiest ..5x+2y=7  -2x+6y=9we rearrange them into the following ..by multiplying the 1st equation by 2 it becomes 10x + 4y = 14we rearrange it and so it becomes 10x = 14 - 4yas for the second equation we multiply it by 5 and rearrange it so it becomes as to the following ..-10x + 30y = 45rearranging so 10x = 30y -45now 10x equals both 14 - 4y and 30y -45so   14 - 4y = 30y -4531 = 26yy= 31/26 = 1.19 or around 1.2so by now we can calculate x easily as  -2x+6y=9so 2x = 6y -9 = 6 * 31/26 - 9 = -1.84  then x = - 0.92 or around -0.9best luck!