Answer:

Step-by-step explanation:
Given:



Required
Solve for JK.
Since J is on IK, we have:



Collect Like Terms


Solve for x


Substitute 1 for x in 


Area of rectangle = x(x+2) = x^2 +2x
area of triangle = x*2/2 = x
so the shaded fraction of the rectangle will be x(x+2)/(x+2)=x
Answer:
you want to isolat U on one side, so subtract 9/-4 from both sides to end up with (9/-4) - 9 = u, then solve. (9/-4)-9 = -11.25, so -11.25 = u