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zmey [24]
3 years ago
8

What is halfway between positive 6900 and negative 8100?

Mathematics
1 answer:
Burka [1]3 years ago
3 0
First, add them together: 6900 + (-8100) = -1200
Then, divide the answer by two to find the halfway number: -600 is the halfway point.
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Solve the equation<br> 2x-3=15<br> A)x=6<br> B)x=9<br> C)x=24<br> D)x=36
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Read 2 more answers
The function y = -16x2 + 1500 gives a parachute jumper's height y in feet
earnstyle [38]

Answer:

Step-by-step explanation:

so the question is asking about the time from 1500 feet to 1100 feet.  How long did they fall, w/o a parachute.    aka   "freefall"   so,   at 1500 feet the jumper is really at time zero.   so, plug in to the formula

1100 = -16x^{2} +1500  

( x represents seconds so i'll change it to t so we know it's time )  

1100 = -16t^{2} + 1500

now we can solve for t  , to see how long the jumper falls

-400 = - 16t^{2}      ( subtracting 1500 from both sides of equation )

25 = t^{2}      ( dividing both sides by  -16 )

oh.. look at how nice that turns out.. :)

\sqrt{25} = t  ( take the square root on both sides )

5 = t    

the jumper fell for 5 seconds to get to 1100 feet  

5 0
3 years ago
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