O 5(-8) = -40 this is the correct one and the question ask except
84/60=1.4
210/1.4=150
The answer is 150 cm
i dont have much time to go through all the work but i can tell you that since its a 90 degree angle, your equation would be 90=15x-2+7x+4. Once you get the value of X plug that into each of the equations. For example if your x value was 2 you would do 15(2)-2. Thats just an example.
