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Mumz [18]
3 years ago
5

None of the answers here are helpful. Please help me...

Mathematics
1 answer:
ycow [4]3 years ago
3 0

Answer:

The ball will strike the ground at time t = 21sec .

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Aleks04 [339]

Answer:

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Step-by-step explanation:

x + y - z = -3 (1)

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