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put this solution on YOUR website!the height of the mountain and the distance to the mountain form a right angle
the height divided by the distance is the tangent of the angle of elevation of the mountain top
let x="height of the mountain" __ x/d=tan(22°) __ x/(tan(22°))=d
x/(d-100)=tan(30°) __ x/(tan(30°))=d-100
x/(tan(30°))=(x/(tan(22°)))-100 __ (x/(tan(30°)))-(x/(tan(22°)))=-100
x(tan(22°))-x(tan(30°))=-100(tan(22°))(tan(30°)) __ x=(-100(tan(22°))(tan(30°)))/((tan(22°))-(tan(30°)))
