Estimate  the difference. use benchmarks with decimal parts of 0, 0.25, 0.50, or  0.75
7.23-1.43
a. 5.50
b. 5.75
c. 6

Which lines are parallel? justify your answer. lines p and q are parallel because same side interior angles are congruent. lines p and q are parallel because alternate exterior angles are congruent lines l and m are parallel because same side interior angles are supplementary lines l and m are parallel because alternate interior angles are supplementary.