Solve For X 1 < x + 3 < 4

The line containing the midpoints of the legs of right triangle abc where a(-5,5), b(1, 1), and c(3, 4) are the vertices.

Julie goes to the sports store and spends $40.50 before tax. she buys a pair of shorts for $21.75 and 3 pairs of socks that each cost the same amount. how much does each pair of socks cost? $$

What is the missing reason in the proof? segment addition congruent segments theorem transitive property of equality subtraction property of equality?