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WINSTONCH [101]
3 years ago
13

Because the length cannot be negative the height of the plane is ___ miles.

Mathematics
1 answer:
Rudik [331]3 years ago
8 0

Look at all the steps above. They lead to a double solution. The symbol

x=\pm 5

means that x can be either positive or negative 5. You can't accept negative values for lengths, so you're left with one option only.

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