Question

If E is a midpoint of DF, find the value of x. Round your answer to the nearest tenth if necessary. EF = 92FD = 9X - 10

Answer 1

E = midpoint

DF = DE + EF

but, DE = EF because E is the midpoint

Substitution

9x - 10 = 92 + 92

Simplification

9x - 10 = 184

9x = 184 + 10

9x = 194

x = 194/9

x = 21.55