Hehe 
Another one guys Where the tree stood there was a storm that broke the top of the tree. The tree was 18m high before it broke and I need to find out how high up it broke
+128475 Call the part of the tree leaning over, (18 -x).....and by the Pythagorean Theorem,
4.2^2 + x^2 = (18 - x)^2 simplify
17.64 + x^2 = x^2 - 36x + 324 subtract x^2 from both sides
17.64 = -36x + 324 rearrange
36x = 324 - 17.64 divide both sides by 36
x = [324 - 17.64] / 36 = 8.51 m ..... and that's how high up it broke
+128475 Call the part of the tree leaning over, (18 -x).....and by the Pythagorean Theorem,
4.2^2 + x^2 = (18 - x)^2 simplify
17.64 + x^2 = x^2 - 36x + 324 subtract x^2 from both sides
17.64 = -36x + 324 rearrange
36x = 324 - 17.64 divide both sides by 36
x = [324 - 17.64] / 36 = 8.51 m ..... and that's how high up it broke
