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3 years ago

Please answer this and thank you If DF=78, DE=5x-9, and EF=2x+10, find EF.

Mathematics

2 answers:

gregori [183]3 years ago

6 0

DE + EF = DF
5x - 9 + 2x + 10 = 78
7x+ 1 = 78
7x = 77
x = 77/7 = 11

EF = 2x + 10
EF = 2*11 + 10
EF = 22 + 10
EF = 32

AleksAgata [21]3 years ago

6 0

Question

If DF = 78, DE = 5x-9, and EF = 2x+10, find EF.

Answer

EF = 32

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3 years ago

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4 years ago