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N76 [4]
3 years ago
5

What is the sum of the last four terms of the series 7+9+11+...+21

Mathematics
1 answer:
Doss [256]3 years ago
7 0
<span>7 - 9 = 2 9 - 11 = 2 You should see that the series just increases by +2 therefore you can figure out what the last four terms are and then add them up one of the last terms given is 21</span>
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First, factor out 5:
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It will take Adam four hours to drive to Disney Park, and 2.5 times less time if driving 45 mph faster. What is the distance Ada
Travka [436]

Answer:

120 miles

Step-by-step explanation:

we know that

The speed is equal to the distance divided by the time

Let

s------> the speed in mph

d-----> the distance in miles

t -----> the time in hours

s=d/t

solve for the distance

d=s*t

<em>It will take Adam four hours to drive to Disney Park</em>

s=x mph

t=4 h

substitute

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so

s=(x+45) mph

t=4/2.5=1.6 h

substitute

d=1.6(x+45) -----> equation B

equate equation A and equation B

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Solve for x

4x=1.6x+72

4x-1.6x=72

2.4x=72

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3 0
3 years ago
Read 2 more answers
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Step-by-step explanation:

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