Answer:
So let me help you!
Step-by-step explanation:
KF = 8 units
m∠DFE = 90°
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We know that DK is 16 so you would just have to divide it by 2

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Since EF is a bisector, split it right down the middle means it will be equal to 90 degrees.
2.5 and 5 should be the answer
Answer:
(-6, 8)
Draw the point, draw the lines of reflection, reflect, find coordinates.
First you need to get x on one side so subtract 3x from both sides which will leave you with 8=2x-20. Next add 20 to both sides to get 28=2x. Then divide everything by 2 and you should get x = 14.