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blondinia [14]
3 years ago
12

I only have 8 minutes left please help!!! The expression h(x)= -5x2 + 25x + 70 can be used to estimate the height(h), in meters,

of a toy rocket x seconds after it is launched from
a platform. Substitue 0 for h in the equation, and determinehow many seconds it will take for the rocket to hit the ground? Enter the
answer that makes the most real world sense for the scenario described.

Mathematics
1 answer:
rewona [7]3 years ago
8 0
Hence x is 7 seconds

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Answer:

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Step-by-step explanation:

t = ten's digit    u= one's digit

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In the first equation substitute for t 2u - 4 that we find in the second equation above.

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2u - 4 + u = 14  Combine the u's

3u - 4 = 14  Now add 14 to both sides

3u = 18  Divide both sides by 3

u = 6.  We found the unit's digit, now we will find the ten's unit by plugging in 6 for u in the first equation above.

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t + 6 = 14  Subtract 6 from both sides

t = 8

So, your answer is 86.

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