E is the midpoint of DF. IF DE = x + 5 and DF = 3x + 2, what is DF?
2 answers:
Answer:
13
Step-by-step explanation:
If E is the midpoint, Then DE = FE
=> x+5 = 3x+2
=> 3x-x = 5-2
=> 2x = 3
=> x = 3/2
<u><em>Now DF:</em></u>
=> 3/2 + 5 + 3(3/2)+2
=> (3+10)/2 + (9+4)/2
=> (13+13)/2
=> 26/2
=> 13
Answer:
13
Step-by-step explanation:
x+5=3x+2
5=2x+2
3=2x
x=1.5
1.5+5=6.5
6.5 is half of DF, DF=13
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