The answer is the last one. Except for the first one, the questions are asking which two line segments are congruent (or equal to each other) in the triangle. Hope this helps :3<span />
Where is it shown? Please show a picture
Multiply both sides by 2.
2m = a + b
Subtract both sides by b.
2m - b = a
3•1 3/4 is Greater than 1 3/4