a ladder 30m long, rests against a vertical wall. if the foot of the ladder is 24m away from the wall, how far up the wall is the ladder.

answer is 18

Step-by-step explanation:

use Pythagoras theorem with is a²+b²=c²

if u draw the ladder against the wall you'll get a right triangle .

c is hypotenus which is the longest side of the triangle so it is 30

so you'll get 24²+b²=30²

rearrange to b²=30²-24²

you'll get b=

therefore that is 18

hope you understood :)

i believe it is c.y = 9x

rise over run. 9 units up over 1 unit right or 9/1