👉🏼c is 20% more than b and b is 15% more than a. What percentage is c more than a?

👈🏼Find the angle BAC in the diagram below:

🖐🏼Point 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.

👆🏼Arrange in order from smallest to largest: (a) 5 x 10^-1, (b) 10^-4, (c) 2 x 10^-4, and (d) 10^-2.

👇🏼w:x = 2:3 and x:y = 9:8, so work out the size of angle z below: