What is the sum of the first six terms of the geometric series?2 – 6 + 18 – 54 + ...
a)–486
b)–364
c)–40
d)122

Answers

Answer 1
Answer:

The sum of the first six terms of the geometric series will be -364. Hence, option (B) will be correct.

What is geometric series?

A geometric series is a series in which the division of any consecutive two terms will be the same.

For example 3, 6, 12, 24 here if you divide 6 by 3 then it gives you 2, and if you divide 12 by 6 then also it gives you 2, and so on.

Given up series is 2, – 6, 18, – 54

The common ratio of this GP is -3 by that

The remaining elements of this gp will be 162, -486

So the sum will be 2 - 6 + 18 - 54 + 162 - 486 = -364 so it will the summation of the given gp.

For more about geometric series

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Answer 2
Answer:

Answer:

the answer is -364

Step-by-step explanation:


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The tables below show four sets of data: Set A
x 1 2 3 4 5 6 7 8 9
y 10 9 8 7 6 5 4 3 2
Set B
x 1 2 3 4 5 6 7 8 9
y 3 4 5 6 7 8 9 10 11


Set C
x 1 2 3 4 5 6 7 8 9
y 8 6 5 4 3.5 3 2.5 2 2
Set D
x 1 2 3 4 5 6 7 8 9
y 1 2.5 2.5 3 4 5 6 8 9


For which set of data will the scatter plot represent a negative linear association between x and y? (4 points)


Set A
Set B
Set C
Set D

Answers

Answer:

Hence, the set that represent a negative linear association between x and y is:

Set A.

Step-by-step explanation:

We are given 4 sets of data as:

Set A  

x 1 2 3 4 5 6 7 8 9  

y 10 9 8 7 6 5 4 3 2

Set B  

x 1 2 3 4 5 6 7 8 9  

y 3 4 5 6 7 8 9 10 11

Set C  

x 1 2 3 4 5 6 7 8 9  

y 8 6 5 4 3.5 3 2.5 2 2

Set D  

x 1 2 3 4 5 6 7 8 9  

y 1 2.5 2.5 3 4 5 6 8 9

We are asked to determine the set which represent negative linear association between x and y?

  • Clearly in Set B and Set D the values of y keeps on increasing as the value of x increases; hence they both represent a positive linear association between x and y.
  • In set C the relationship is non-linear though it is negative.
  • Clearly in Set A we could see that the the y is related to x as:

         y=11-x or y= -x+11.

Hence, clearly we could see that the relationship is linear and also negative as the value of y keeps on decreasing with increasing x.

Hence, the set that represent a negative linear association between x and y is:

Set A.

Answer:

it is set a

Step-by-step explanation:

If the lateral edge of a regular tetrahedron is 8 cm, then it's altitude is?​

Answers

Answer:

The altitude is 6.53 cm

Step-by-step explanation:

A regular tetrahedron is a triangular pyramid having equilateral triangular faces, therefore we have;

Sides of the equilateral triangle = 8 cm

Given that the slant height, the edge of the tetrahedron, and half the base edge of the tetrahedron form a right triangle, we have;

The slant height, h = √(8² - (8/2)²) = √48 = 4×√3

The segment representing the altitude, H, of the tetrahedron forms a right triangle with the edge of the tetrahedron and 2/3×h

Therefore;

8² = H² + (2/3×4×√3)²

H² = 8² - (2/3×4×√3)²

H² = 64 - 64/3 = 128/3

The altitude H = √(128/3) = √6×8/3 = 6.53 cm.

Please i need this for hwk

(3n+5)/(3n)-(n)/(n-1)

Answers

ANSWER :

» 14n-6/3

refer to the above attachment ↑

Add The Following Polynomials?(6x^3 + 4x-2) + (4x^2 + 3x^3 - 6)
I have no clue how to do this I missed a lot of days in school due to personal issues
if someone could help me that would be great!

Answers

(6x^3 + 4x-2) + (4x^2 + 3x^3 - 6)=
6x^3 + 4x-2 + 4x^2 + 3x^3 - 6=
9x^3+4x^2+4x-8

Find the surface area of a rectangular prism with base 5 m by 2 m and height 8 m. a. 15 m² b. 80 m² c. 30 m² d. 132 m²

Answers

Answer:

Total area = 2 * base area + side area

Lateral area = base perimeter * height

Total area = 2*(5*2)+2(5+2)*8

2*10 + 2*7*8=

20+112=132m²

Determine the area of triangle ABC with AC =5cm and height DB =30mm​

Answers

The answer to the question is 75mm^2 because the formula is half base multiplied by height