Best of 2019!

While there were many problems written and solved for MATHCOUNTS in 2019, below is a selection of some of the best of the year!

2018-2019 School Handbook, #27

A segment with endpoints G(-2, 3) and H(4, 7) is dilated by a scale factor of 2/3 with center of dilation (0, 0). What is the sum of all the coordinates of G’ and H’?