Can somebody tell me what i did wrong

Because ∠PTS and ∠QTR are vertical angles, we can use the Vertical Angle Theorem to say they are equal. Therefore:

11(y - 10) = (4y - 5)

Now, solve for y:

11y - 110 = 4y - 5

7y = 105

y = 15

You got up to here, but rather than finding the angle measure they asked for, you put the value of y. So, lets do that. Plug y back into ∠PTS:

11(y - 10)

=11(15 - 10)

=11(5)

=55

Therefore, the measurement of ∠PTS is 55°.

Hope this helps! :)

1; 35 is the ratio

step-by-step explanation:

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this