1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
SVETLANKA909090 [29]
3 years ago
15

Use the formula to evaluate the series 3-9+27-81+...-a8

Mathematics
1 answer:
Andrej [43]3 years ago
6 0

In the given series, we see that the first term is 3 and the common ratio between the succeeding terms is -3. To solve for the sum of the first 8 terms, we use the equation,

                                    Sum = (a1)(1 – r^n) / (1 – r)

Substituting the known terms,

                                    Sum = (3)(1 – (-3)^8)/(1 - -3) = -4920

<span>Thus, the answer is -4920.</span>

You might be interested in
1.Write an equation in slope- intercept form of the line that passes through the given point and is parallel to the graph of the
Kryger [21]
<span>1.Write an equation in slope- intercept form of the line that passes through the given point and is parallel to the graph of the given equation. (2,-2);y=-x-2

D.y=-x

2.Write an equation in slope- intercept form of the line that passes through the given point and is parallel to the graph of the given equation. (2,-1);y=-3/2x-6

C.y=-3/2x+2  

3.Write an equation in slope- intercept form of the line that passes through the given point and is parallel to the graph of the given equation. (4,2);x=-3
 D.y=4

4.Write an equation in slope- intercept form of the line that passes through the given point and is perpendicular to the graph of the given equation. (-2,3);y=1/2x-1

B.y=-2x-1 

5.Write an equation in slope- intercept form of the line that passes through the given point and is perpendicular to the graph of the given equation. (5,0);y+1=2(x-3)

 D.y=-1/2x+5/2</span>
5 0
2 years ago
Read 2 more answers
600(2)/94(0.6(2)+169
kogti [31]

Answer:

2172.7

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
What is the answer to y=-2/3+b
Mashcka [7]

Answer:

it is B

Step-by-step explanation:

8 0
2 years ago
QUICKLY HELP!
Leviafan [203]

a+(−5)=−12

a−5=−12

a = -12 + 5

a = -7

answer is b. a=−7

7 0
3 years ago
Read 2 more answers
A hat contains four balls. The balls are numbered 2, 4, 4, and 7. One ball is randomly selected and
vfiekz [6]

Answer:

  • If the sum is 6, a small cone will be ordered.
  • If the sum is 8 or 9, a medium cone will be ordered.
  • If the sum is 11, a large cone will be ordered.

Step-by-step explanation:

The table below shows the possible outcomes from drawing two balls. We see the relative frequencies to be ...

  6: 4

  8: 2

  9: 2

  11: 4

To make a fair decision, we want the relative frequencies of the decision possibilities to be the same. If we combine sums 8 and 9 to one category (medium cone, for example), then 6, (8 or 9), and 11 will all have the same relative frequency: 4.

The appropriate "fair decision" choice is ...

  6: small cone

  8 or 9: medium cone

  11: large cone

6 0
3 years ago
Other questions:
  • Triangle DEF is a dilation of triangle ABC with scale factor 2. In triangle ABC, the largest angle measures 82∘. What is the lar
    6·1 answer
  • The sum of Rick's test score and 15is100.What was the Rick's score?
    14·2 answers
  • WILL GIVE BRAINLIEST!!
    7·2 answers
  • PLEASE HELP!!! What is the simplified form of square root of 2160x^8/ 60x^2? Assume
    10·2 answers
  • A 0.1 significance level is used for a hypothesis test of the claim that when parents use a particular method of gender​ selecti
    10·1 answer
  • Plz help with all ile give brainliest​
    9·1 answer
  • This is worth 15 points please help. What is the equation in y=mx+b. Read the directions correctly, please.
    12·2 answers
  • The object was turned 45 degrees around a fixed point that's called?​
    14·1 answer
  • The inside of an ice cream scoop...
    15·1 answer
  • Please help I will give brainliest
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!