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
slavikrds [6]
3 years ago
9

Evaluate 7 sigma n=1 2(-2)^n-1

Mathematics
2 answers:
torisob [31]3 years ago
6 0
Okay I think you mean the sum of the first 7 terms of the geometric sequence:

a(n)=2(-2)^(n-1)

The sum of any geometric sequence is:

s(n)=a(1-r^n)/(1-r)  in this case:

s(7)=2(1--2^7)/(1-7)

s(7)=-43
oksian1 [2.3K]3 years ago
5 0
\[\sum_{n=1}^{7} 2(-2)^{n-1}\]
You might be interested in
Which function is nonlinear?
lutik1710 [3]

Answer:

(-1,5), (0,4) ,(1,3) ,(3,1) is linear so dont pick it

(-4,-7), (-2,-6), (2,-4), (4,-3) is linear

you know what I'll just say it wait a minute is there like a other option

Step-by-step explanation:

U can tell by graphing them out yourself and if u see a straight line then it linear, and if you see a curved loop then it's non- linear. but I'll do it :)

4 0
3 years ago
Apply the distributive property to factor out the greatest common factor.<br> 45e -27f
mojhsa [17]

Answer:

9 (5e - 3f)

Step-by-step explanation:

45e -27f

45e = 9*5*e

27f = 9*3*f

The common factor is 9

9*5*e -  9*3*f

9 (5e - 3f)

8 0
3 years ago
Read 2 more answers
Someone please help!
valentina_108 [34]

Answer:

x = 33

Step-by-step explanation:

8 0
2 years ago
Find AC. PLSSS HELP BRAINLIEST....
MrRissso [65]

Answer:

5.3

Step-by-step explanation:

Cos(68) = adjacent/hypotenuse

Cos(68) = 2/AC

AC = 2/cos(68)

AC = 5.3389343253

AC = 5.3

4 0
3 years ago
Read 2 more answers
Twice a number decreased by 16 is 64.
Artyom0805 [142]
You number is 40 40 x 2= 80- 16 =64 your welcome :)
8 0
3 years ago
Other questions:
  • A bottle contains 20fluid ounces of lotion and sells for $5.80.The 20-fluid -ounce bottle contains 125% of the lotion in the nex
    14·1 answer
  • What is the mean of the values in the dot plot?<br><br><br> Enter your answer in the box.
    13·1 answer
  • I need help with Points on a Grid.
    13·1 answer
  • An electrician uses 7 m of wire to join a junction box at the top of a utility pole to a junction box at ground level so that th
    11·2 answers
  • Helen spends 12% of her budget on transpiration expenses. Write this percent as a fraction and decimal and explain how.
    9·1 answer
  • Help me please with this
    11·1 answer
  • If a man is driving at a rate of 80 km per hour, how many kilometers will he travel in 30 minutes? A. 30 km B. 40 km C. 60 km D.
    6·2 answers
  • Where are the zeros for f(x) = 3 sin 2x on the interval [0, 21)?
    15·1 answer
  • Hurry I will mark brainlist if you help with me with these 2 simple questions
    8·1 answer
  • Tirzah wants to put a fence around her garden. She has 22 yards of fence material. Does she have enough to go all the way around
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!