Express the series using sigma notation. 6 + 9 + 12 + 15.

Answers

Answer 1
Answer:

15

Σ  40

n=6

explanation; add all the numbers to get 40

6 is the first number and 15 is the last number

Answer 2
Answer:

Answer: D on edg

Step-by-step explanation:


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Jane,Andre,and Maria pick apples. Andre picks three times as many pounds Maria. Jane picks two times pounds as Andre. The total weight of apples is 840 pounds. How many pounds of apples does Andre pick?

Someone please help me with math

Answers

10. 4.36041667, or 4.36.
11. 81.9444444, or 81.94
12. 3.12317073, or 3.12

I hope this helped! Please take thetime to rate, pick the Brainliest answer (not necessarily mine!), and thank me if you feel Ihelped with this question! Thank you, it helps me a lot. :)

Slove:12x9³x4
- means divide
---------------

6x8²x27

Answers

Answer:

1. 34,992. 2. 10,368

Step-by-step explanation:

1.) Write the problem out. 12x(9x9x9)x4

2.) Solve what's in the parentheses first 729

3.) Rewrite your problem 12x729x4

4.) Multiply by 12 then 4

DOTHESAMEFORBOTHPROBLEMS

the cost price of machine is 2,50,000.if the rate of depreciation is 10% per year find the depreciation in price of machine after two years.​

Answers

Step-by-step explanation:

cost price= 250000

depreciation= 10%

time or years= 2

depreciation price = cost price× depreciation%

2,50,000×10%

2,50,000×10/100

25,000

then 2 years depreciation = 1 year depreciation price ×number of years

25,000× 2

50,000

therefore depreciation price of machine after 2 years is 50,000

Which sets of numbers represent geometric sequences? Check all that apply.2/5,2/10,2/20,2/40...

11/12,8/12,5/12,2/12

25, 19, 13, 7, ...

4, 12, 36, 108, ...

–5, 5, –5, 5, ...

–3, 0, 3, 6, ...

–8, –2,1/2.1/8...

Answers

Answer:

2/5,2/10,2/20,2/40...

4, 12, 36, 108, ...

–5, 5, –5, 5, ...

Step-by-step explanation:

These 3 sets represent a geometric sequence.

A geometric sequence is a series of numbers where each number is obtained by MULTIPLYING the same fixed number to the previous number.

So, in the first sequence: 2/5,2/10,2/20,2/40...

The multiplying factor is 1/2.

In the second sequence: 4, 12, 36, 108, ...

The multiplying factor is 3

In the 3rd sequence: –5, 5, –5, 5, ...

The multiplying factor is -1.

Most of the other sequences are not geometric sequences, but arithmetic sequences (where the next term is obtained by ADDITION).

the one above me is correct

I don’t know how to do the steps help please thank you

Answers

Answer:  The correct answer is:  " 6 ∛3 " .

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Step-by-step explanation:

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Given:     2  *  \sqrt[3]{81}   ;  

Simplify this given expression:

Let us list the factors of:  81:

1, 2, 3, 9, 27 , 81 .

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Are any of these factors "perfect cubes"?

Let's see:  ∛27 =  3 ;   (use calculator);  since:  " 3³ = 3 * 3 * 3 " .

81 = 27 * 3 ;

So:    "  ∛(81) " ;

          =  ∛(27)  * ∛(3)  ;

          =  " 3  *  ∛3 "  ;

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 →   The original expression:

    " 2 * ∛81 " ;

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              =  2 * 3 * ∛3 ;

              =  (2 * 3)  * ∛3 ;

              =   6 ∛3  .

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The answer is:  " 6 ∛3 " .

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Hope this answer is helpful to you!

           Wishing you the best!

_______________________________________________

What is -9x-(2x/-3) When x equals 7

Answers

-9x- (2x)/(-3)

-9*(7) - (2*7)/(-3)

9*7 = 63

(2*7)/(-3) = (14)/(-3)

Apply the fraction  rule : (a)/(-b) = - (a)/(b)

= - (14)/(3)

-63-( -(14)/(3) )

Apply rule  - ( - a) = a

-63+ (14)/(3)

Convert  element to fraction :

63 = (63)/(1)

-(63)/(1) + (14)/(3)

Find the LCD 1*3 = 3

- (63*3)/(3)+ (14)/(3)

(-3+63+14)/(3) = (-175)/(3)

Apply the fraction  rule : (a)/(-b) = - (a)/(b)

= - (175)/(3)

hope this helps!