A sand dune stands 5 feet above sea level. The hill is eroding at a rate of 1 foot per 20 years. Let y represent the height of the sand dune after x years. Which equation represents the situation?

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02-05-2018
Mathematics

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A sand dune stands 5 feet above sea level. The hill is eroding at a rate of 1 foot per 20 years. Let y represent the height of the sand dune after x years. Which equation represents the situation?

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CastleRook CastleRook · Answer 1 · 2018-05-11T11:54:53+02:00

CastleRook CastleRook

11-05-2018

The situation will be represented by linear equation, this is given by:
y=ax+b
where:
a=slope=rate
b=y-intercept
from our situation:

a=-1/20
b=5 ft
thus the equation modeling the situation will be:
y=-1/20x+5

Answer: y=-1/20x+5

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shestanl6 shestanl6 · Answer 2 · 2019-05-17T00:37:12+02:00

shestanl6 shestanl6

17-05-2019

Answer:

y=-1/20x+5

Step-by-step explanation:

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