30/40 Maybe I am guessing sorry if it is wrong Please mark me as brainliest
the answer to the problem is 2y^3 3x3y4+4
3. {6,9,15)
for these u have use Pythagoras theorem
Your proportion should look something like this

After cross multiplication, you should end up with this equation

After dividing 4 on both sides, you should get that x=9
If you separate the triangles, you'll notice that both are literally the same triangle because all angles are the same.