De=4x+10,ef=2x-1,and df=9x-15 find df

DF = 57

Step-by-step explanation:

From the given information on the line segments we can write the equation

DF = DE + EF ( substituting the values into the equation )

9x - 15 = 4x + 10 + 2x - 1

9x - 15 = 6x + 9 ( subtract 6x from both sides )

3x - 15 = 9 ( add 15 to both sides )

3x = 24 ( divide both sides by 3 )

x = 8

DF = 9x - 15 = (9 × 8) - 15 = 72 - 15 = 57

b

step-by-step explanation:

if a was wrong then it has to be b it cant be c either because not all the y intercepts are the same!

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