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olchik [2.2K]
4 years ago
8

WhaT is the sum of the first 6 terms of this geometric system -5,10,-20,40,...

Mathematics
1 answer:
jeyben [28]4 years ago
7 0
Each one is multiplied by -2...

PROOF
-5 * 10 = -20
-20 * -2 = 40
And so on.

So we need two more numbers so do 40 * -2...

40 * -2 = -80

And then...
-80 * -2 = 160

So the first 6 numbers are...
-5, 10, -20, 40, -80, 160.

We need to find the SUM, which is all the numbers added together.

-5 + 10 - 20 + 40 - 80 + 160 = 105

105 is your answer.
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The correct answer is C.

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20:45. In common time it is 8:45 o'clock
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Liam, Sarah and Emily shared some money in the ratio 2:3:5. Liam got £30 less than Sarah.
blondinia [14]

The number representing Liam's share is 2; for Sarah's share, it is 3. The difference of those is 1, so each 1 unit of share must be £30, the difference between the amount Sarah got and the amount Liam got.

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Which ratios are equivalent to 3 parts silver paint to 4 parts green paint?
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Step-by-step explanation:

let : the pair of jeans = X

a. the equation is :

4(X-3) + 8 = 92

b. 4(X-3) = 92-8

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X = 96/4

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so, the price of each pair of jeans = $24

_________

For the solution x = 2.6, the left side of equation

(2x - 6) => would be 2(2.6)-6 = 5.2-6 = -8 ( the negative value),

but on the right side of the equation 4x+8 => 4(2.6) +8 = 18.4 ( the positive value)

this difference indicates that x=2.6 is not the right solution.

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