If i have a question on my work that says solve the equation how could i solve this one, (7,-6): m = -4 im not really sure how to solve it

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.

We just started the introduction into circles and i have no idea how to do this.

Line segment eg is partitioned by point f in the ratio 1: 1. point e is at e (0, 4), and point f is at (1, 3). what are the coordinates of point g? (−1, 5) (2, 2) (3, 1) (4, 0)