PLZ HELP!!

Simplify the following:
5-6 to the 2nd power divided by 4-3

How do you summarize data in a two-way frequency table?

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

Isabel graphed the following system of equations. 2x – y = 6 y = -3x + 4 she came up with the solution (2,-2). what were the 3 steps she did to get that solution? (make sure they are in the correct order)