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
Marina CMI [18]
3 years ago
9

PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!

Mathematics
2 answers:
Vinvika [58]3 years ago
6 0

Hello there,

What is the sum of the first 7 terms of the series −8 +16 −32 + 64−... ?

Answer: -258



ch4aika [34]3 years ago
3 0

Answer: -258

<u>Step-by-step explanation:</u>

Given the sequence {-8, 16, -32, 64, ... , a₇} we know the following

  • the first term (a₁) = -8
  • the common ratio (r) = -2
  • the number of terms (n) = 7

Input the information above into the Sum formula:

S_n=\dfrac{a_1(1-r^n)}{1-r}\\\\S_7=\dfrac{-8(1-(-2)^7)}{1-(-2)}\\\\.\quad =\dfrac{-8(1-(-128))}{1+3}\\\\.\quad =\dfrac{-8(129)}{4}\\\\.\quad =-2(129)\\\\.\quad =-258

You might be interested in
What is the answer to this equation 3x-5=2(2x+5)
djyliett [7]

Answer:

x=-1 1/4

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
What is the square root of 50 rounded to the nearest hundredth?
tamaranim1 [39]
Let's write an inequality, such as follows: x < sqrt(50) < y. Square both sides of the equation. We get x^2 < 50 < y^2. Obviously, x is between 7 and 8. Also notice, that for integers a,b, (ab)^2/b^2, equals a^2. So let's try values, like 7.1. Using the previous fact, (7.1)^2, equals (71)^2/100. So, (7.1)^2, equals 50.41. Thus, our number is between 7 and 7.1. We find, with a bit of experimentation, that the square root of 50, is 7.07.
8 0
3 years ago
Micheal has a rectangular shed of an area of 24 square feet. The shed is 5 feet longer than it’s width. Create an equation that
BaLLatris [955]

Answer:24= x+5

Step-by-step explanation:

7 0
3 years ago
How do you solve 34.86 x 1.2?
Nezavi [6.7K]

Answer: 41.832

Step-by-step explanation:

I like to write decimals without decimals when multiplying. for this I would do  

3486 x 12 which equals 41832 then You would move the decimal up from 3 spaces from the 2 from 41832 which would put the decimal between the 1 and 8

3 0
3 years ago
The histograms below show the heights (in meters) of the tallest buildings in China and the United States.
USPshnik [31]

Answer:

A and B

Step-by-step explanation:

I tried it and it was correct. The United states has the tallest... and China has more buildings... are the correct ones.

6 0
3 years ago
Other questions:
  • One pump fills a tank 3 times as fast as another pump. If the pumps work​ together, they fill the tank in 12 minutes. How long d
    13·1 answer
  • If cos -105º = -0.26 and csc -105º = -1.03, then cos 105º = ?<br> and csc 105º = ?
    8·1 answer
  • Can any one help me with this please.??
    5·1 answer
  • A handful of chewing gum contains 5 red pieces out of 11. What is the probability that a randomly selected
    9·1 answer
  • Write a rule for the function please!!!
    9·1 answer
  • According to a study published in the New England Journal of Medicine, overweight people on low-carbohydrate and Mediterranean d
    15·1 answer
  • Someone help hahaha
    6·1 answer
  • How are the measures of angles, arcs and segments formed by secant lines that intersect within a circle related?
    8·2 answers
  • Round 97.081 to the nearest 10th
    7·2 answers
  • Quisssssss :'^(<br><br>A = 10<br><br>2A + 4A - 3A​
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!