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4 years ago

2/3 x 2/3 x 2/3 = plz answer me

Mathematics

1 answer:

inessss [21]4 years ago

7 0

The answer is 8/27 beacuse you must moltiplicate 2 for 2 and after for 2. Then 3 for 3, and after for 3

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Evaluate using the finite geometric sum formula

Sever21 [200]

Answer:

$S_9=-18.703$ .

Step-by-step explanation:

The given series is,

$\sum_{i=1}^9(-\frac{1}{2})^{i-1}$

When we substitute $i=1$ , we get the first term, which is $a_1=-28(-\frac{1}{2})^{1-1}$

This implies that,

$a_1=-28(-\frac{1}{2})^{0}$

$a_1=-28(1)=-28$ .

The common ratio is

$r=-\frac{1}{2}$

The finite geometric sum is given by the formula,

$S_n=\frac{a_1(r^n-1)}{r-1} , -1\:$ .

Since there are 9 terms, we find the sum of the first nine terms by putting $n=9$ in to the formula to get,

$S_9=\frac{-28((-\frac{1}{2})^9-1)}{-\frac{1}{2}-1}$ .

$S_9=\frac{-28((-\frac{1}{512})-1)}{-\frac{3}{2}}$ .

$S_9=\frac{-28(-\frac{513}{512})}{-\frac{3}{2}}$ .

$S_9=-28(\frac{171}{256})$ .

$S_9=-\frac{1197}{64}$ .

$S_9=-18.703$ .

The correct answer is B

4 0

3 years ago

Read 2 more answers

If X= -6 and y=4 what is x² + y²

Rainbow [258]

Answer:

Step-by-step explanation:

(-6)x(-6)=36

(4)x(4)=16

36+16=52

6 0

3 years ago

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A net for which three-dimensional figure would always have 6 congruent rectangular regions

Crank

If I am correct it should just be a cube

3 0

3 years ago

If p∥q, m∠2=5b+1, and m∠12=6b−8, find m∠1 and m∠3.

lesya [120]

Answer:

Step-by-step explanation:

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7 0

3 years ago

Add the equations.3x-y=-5<br> 7x+y=15

Alisiya [41]

Step-by-step explanation:

it is like a regular addition of numbers. you add the different positions.

3x + 7x = 10x

-y + y = 0

-5 + 15 = 10

so, D. is the right answer : 10x = 10

7 0

2 years ago