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
katrin2010 [14]
3 years ago
5

Find S8 for the geometric series 3 + -6 + 12 + -24 +…

Mathematics
1 answer:
kirill115 [55]3 years ago
6 0
I guess you are asking to find the sum of the first 8 terms. If so, then:
Sum = a₁(1-rⁿ)/(1-r), where a₁ is the 1st term,  r=common ratio and n=number of terms:
the 1st term a₁ =3
common ratio r = - 2 (since -6/3 = - 2, and 12/-6 = - 2, etc.)

Sum = 3[(1- (-2)⁸]/(1-2) = 3(1- 256)/(1/2)
Sum = -1530

You might be interested in
Are the two figures congruent?
geniusboy [140]

Answer:

No, because the reflection of ABC is not congruent to A’B’C’.

Step-by-step explanation:

we know that

The rule of the reflection across the line y=x is equal to

(x,y) -------> (y,x)

so

A(-6,6) -------> A'(6,-6) ----> is ok

B(-3,3) ------> B'(3,-3) ----> is ok

C(-8,2) ------> C'(8,-2) ----> is not ok ( is not a reflection acros the line y=x)

therefore

The triangles are no t congruent, because the reflection of ABC is not congruent to A’B’C’

6 0
3 years ago
Help me please!!!!!!!!!!!!!!!!
Oxana [17]

Answer:f(x)=x2 +1

Step-by-step explanation:

The one represents C in the standard form and it can also be used to represent graph placement so +1 can also represent the vertex going up 1 on the y

7 0
3 years ago
45% of $360 is what as a quantity
Bess [88]
I'm assuming you want to know what 45% of 360 is.....

so you multiply 360 by 0.45 (since 45 is a percent, and to revert it back, you must move the decimal 2 times to the left) and you have your answer...
5 0
3 years ago
Read the excerpt from “Raymond's Run.” But now, if anybody has anything to say to Raymond, anything to say about his big head, t
dsp73

Answer:

D.  She uses Squeaky’s thoughts and words to tell readers about her character.

3 0
3 years ago
Read 2 more answers
R, S, and T are coplanar.<br> True<br> False
Pavel [41]

False, because when you connect them the don't even look like a line.

Hope this helps! ;)

8 0
3 years ago
Other questions:
  • one bus leaves a stop every 9 minutes a second bus leaves every 15 minutes if they both leave at 1:25 at what time will they nex
    8·2 answers
  • Need help with these math problems just 1-6
    9·1 answer
  • Last question very confused on if answer is D please answer as soon as possible
    6·1 answer
  • Sum of 12/13+(-1/13)=
    10·2 answers
  • Which equation represents a line that passes through (4.) and has a slope of
    15·1 answer
  • Please please help me out!!!
    15·1 answer
  • How many free throws could you make out of 20
    15·1 answer
  • Jim has 7/10
    10·2 answers
  • Explain why the scale from ABC to DEF could be 1:3
    13·1 answer
  • Reasoning Solve the given equation and check your answer. Use pencil and paper. Is it possible to solve the equation using​ mult
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!