๐๐ผc is 20% more than b and b is 15% more than a. What percentage is c more than a?

๐๐ผFind the angle BAC in the diagram below:

๐๐ผPoint X has coordinates (9,7) and point Y has coordinates (13,-27). Find the equation of the line perpendicular to XY that passes through the midpoint of XY.

๐๐ผArrange in order from smallest to largest: (a) 5 x 10^{-1}, (b) 10^{-4}, (c) 2 x 10^{-4}, and (d) 10^{-2}.

๐๐ผw:x = 2:3 and x:y = 9:8, so work out the size of angle z below: