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
marishachu [46]
3 years ago
5

What is the sum of the geometric sequence -3, 18, -108, ... if there are 8 terms

Mathematics
1 answer:
creativ13 [48]3 years ago
6 0

Answer:

Step-by-step explanation:

common ratio=18/-3=-108/18=-6, a=-3

sn=a(r^n-1)(r-1)

sn=-3((-6)^n-1)(-6-1)

sn=-3(-6)^8-1)/(-7)

s8=-3(1679615)/(-7)

s8=719836

You might be interested in
Calvin evaluated Negative two-thirds times 5 and one-sixth using the steps below.
Lady bird [3.3K]

Answer: it is In step 2, he confused the multiplication and addition signs mark me brainlyest please

3 0
3 years ago
how do theme and tone work together? a. theme involves characters, and tone involves the historical context of those characters.
ahrayia [7]
Theme and tone work together in that B) theme is a poem's main idea, and tone is the writer's attitude toward that idea. 
4 0
3 years ago
Laboratory Worksheet
aleksandrvk [35]
Heyyyyyyyyyyy Hii what’s up
3 0
3 years ago
The mean of this data set is 9. What number is missing?<br><br> 11,20,_,3,1
kherson [118]
Let the missing number be x

Mean is the total sum of data over the number of data therefore,

(11+20+x+3+1) / 5 = 9
Then simplify
(35 + x) / 5 = 9
Then multiply 5 to both sides
35 + x = 45
Then subtract 35 to both sides to find x
X= 10

Hope this helps!

7 0
2 years ago
I don't understand how to solve these problems
iragen [17]
When adding fractions you need to get common denominators then you multiply too times bottom and then boom add and there you go
8 0
3 years ago
Read 2 more answers
Other questions:
  • What is the volume of the container needed to store 0.8 moles of argon gas at 5.3 atm and 227°C?. . (Given: R = 0.08205 l · atm/
    9·2 answers
  • A car is traveling at a rate of 50 miles per hour. what is the car's rate in kilometers per hour? how many kilometers will the c
    14·1 answer
  • Please help me solve this. <br> -5(f) =-15
    13·1 answer
  • Use repeated subtraction to divide 72÷4
    15·2 answers
  • Convert 534.3% to a decimal
    13·2 answers
  • What’s 5*672 x 972*263
    14·1 answer
  • What is f(5)?<br><br> –8<br> –1<br> 1<br> 8
    13·1 answer
  • A person draws a card from a hat. Each card is one color, with the following probabilities of being drawn: 1/10 for blue, 1/20 f
    13·1 answer
  • Giving brainliest answer
    6·1 answer
  • 33% of what number is 66?<br> A. 200<br> B. 300<br> C. 366<br> D. 660
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!