1. You have to make a system of equations.
 2. The problem gives the following information:Â
 - . Emi said wow I think the top of that waterfall is about 20 ft more than three times the height of a young Redwood.
 - Margaret had a different opinion she said no I think it's about 50 ft less than 4 times the height of the Redwood.
 3. So, you have:
 y: the height of the waterfall.
 x: the height of the Redwood
 4. The equations are:
 y=3x+20  (i)
 y=4x-50  (ii)
 3x+20=4x-50
 x=70 ft
 y=3x+20
 y=230 ft
 How tall is the Redwood and how high is the waterfall?
 The Redwood: 70 ft
 The waterfall: 230 ft
Â