Hello! :)

We can use the following area to solve for the area of the trapezoid pictured:

Where:
h = height
b1 = bottom base
b2 = top base
Plug in the given values:

Simplify:

<h3>
Answer: K ' is at (1, 4)</h3>
Explanation:
Point K is located at (1, -4)
We use the rule that
when reflecting over the x axis.
The x coordinate stays the same, but the y coordinate flips from positive to negative or vice versa.
Therefore, K(1,-4) will move to K ' (1, 4)
The left side was cut out but x will be on top and 5 in the lower square. The last one is the answer.