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A box contains $7.85 in nickels, dimes, and quarters. There are 48 coins in all, and the sum of the numbers of nickels and dimes is two less than the number of quarters. How many coins of each kind are there?
Subsidence
The gradual sinking of the ground's surface, often due to natural processes like the compaction of sediment or human activities like the extraction of underground resources.
Collapse Structures
Geological features that form when the ground above a cavity or void in the Earth's crust falls in or collapses, often leading to sinkholes or cenotes.
Landslides
The movement of a mass of rock, earth, or debris down a slope due to gravity.
P-S Intervals
The time difference between the arrival of primary (P) and secondary (S) waves on a seismogram, used to determine the distance to an earthquake source.
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