Point E is the midpoint of DF. If DE= 8x-13, and EF = 3x+7, what is the length of DF. I need someone to answer this question before tomorrow, please. I have it for a test!!
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1 Answer

DE=EF   (E is the midpoint)

8x-13=3x+7

8x-3x=7+13

5x=20

x=20/5

x=4

DF=DE+EF=(32-13)+(12+7)=19+19=38 units  (same as 2DE or 2EF)
by Level 8 User (32.3k points)

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