math
posted by jessica on .
The upper Angel Falls, the highest waterfall on Earth, is 750m higher than Niagara Falls. If each of the falls were 7m lower, the upper Angel Falls would be 16 times as high as Niagara Falls. How high is each waterfall? Use a chart.

let the height of NF be x m
then the height of AF is x+750
if NF were 7 m lower > x7
if AF were 7 m lower > x+7507 or x+743
then x+743 = 16(x7)
x + 743 = 16x  112
743 + 112 = 16x  x
15x = 855
x = 57
NF is 57 m high, AF is 807 m high.