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nataly862011 [7]
4 years ago
7

Please help I will mark brainlist if correct

Mathematics
1 answer:
Virty [35]4 years ago
4 0
We have 2 equations  here  ( b = cost of bush and  t = cost of a tree)

10b + 4t = 246........................................................(1)
5b + 3t = 147      Multiply this equation by -2:-
-10b - 6t = -294.......................................................(2)

Adding equations (1) and (2) we get:-

0 - 2t = - 48

t = -48/-2 = 24

Plug t = 24 into the first equation:-
10b + 4(24) = 246
10b = 246 - 96 = 150
b = 15 

The answer is one bush costs $15 and one tree costs $24.



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Given:

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The expression that  represents the sum of the series.

Solution:

The first term of the given geometric series is:

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The common ratio of the given geometric series is:

r=\dfrac{a_2}{a_1}

r=\dfrac{\dfrac{8}{5}}{\dfrac{16}{25}}

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Putting a_1=\dfrac{16}{25},r=\dfrac{5}{2},n=10 in the above formula, we get

S_{10}=\dfrac{16}{25}\left(\dfrac{(1-(\dfrac{5}{2})^{10}}{1-\dfrac{5}{2}}\right)

Therefore, the correct option is C, i.e., \dfrac{16}{25}\left(\dfrac{(1-(\dfrac{5}{2})^{10}}{1-\dfrac{5}{2}}\right).

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3 years ago
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Step-by-step explanation:

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Step-by-step explanation:

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