3 years ago

Let

Mathematics

1 answer:

frutty [35]3 years ago

4 0

Here is the answer in comma-separated list.

(5, 10) , (10,15), (15, 20) (20, 25) (25, 300 (30, 35)

You need 5 dimes while having 10 or 25

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Can someone help me with this?

Anna35 [415]

Answer:

Let 'a' be the first term, 'r' be the common ratio and 'n' be the number of terms

Series = 2+6+18.......= 2+2•3¹+ 2•3².......= 728

Now,

$Sum = \frac{a( {r}^{n} - 1) }{(r - 1)} \\$

So,

$\frac{a( {r}^{n} - 1)}{(r - 1)} = 728 \\ \frac{2( {3}^{n} - 1) }{(3 - 1)} = 728 \\ \frac{2( {3}^{n} - 1) }{2} = 728 \\ {3}^{n} - 1 = 728 \\ {3}^{n}=728+1\\ {3}^{n} = 729 \\ {3}^{n} = {3}^{6} \\ \boxed{ n = 6}$

Therefore, number of terms is 6

6 is the right answer.

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2 years ago

Enter a digit in each box to complete the subtraction problem.

elixir [45]

Answer:

I think that in the first 2 boxes its 2 i dont know for the rest though,

Step-by-step explanation:

brainky said "dont say such words here, I'm literally saying nothing rude

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3 years ago

PLEASE HELP!!!! What is 1+1

fiasKO [112]

2 because 1+1=2 and that’s why

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2 years ago

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Will mark brainliest<br> 2+2-1=x

erik [133]

Answer:

2+2 is 4 minus 1 is 3 quick math

Step-by-step explanation:

x=3

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3 years ago

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Can someone please help? I am having trouble with this question. Thank you so much.

Nikitich [7]

Answer:

32 = 26

d 2 = 32

Step-by-step explanation: UMU

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3 years ago