Answer:
C) 140
Explanation:
We can see from the diagram that mMEF + mDEM = mDEF because they share the same lines.
Therefore:
69x + 2 + 34 = 2 + 86x
Now we can solve this equation.
First we can eliminate the +2 from each side as they will cancel:
69x + 34 = 86X
And then rearrange to solve for x:
34 + 69x - 69x = 86x - 69x
34 = 17x
34/17 = 17x/17
x = 2
Now that we have the value for x, we can substitute it into the original equation:
mMEF = 69(2) +2
mMEF = 138 + 2
mMEF = 140
Therefore the correct answer is C) 140.
Hope this helped!