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
Kitty [74]
2 years ago
15

What is the sum of the first seven terms of the geometric series where a1 = 10 and r = −2?

Mathematics
1 answer:
matrenka [14]2 years ago
4 0
Sum_{7} = 10 *  \frac{1- (-2^{7}) }{1 - (-2)} =  10*  \frac{1+128}{1+2} = 10*  \frac{129}{3} =   10 * 43 = 430
You might be interested in
If c(x) = 5/(x - 2) d(x) = x + 3 , what is the domain of (co)(x) ?
frosja888 [35]

Answer:

Domain of (cd)(x) is all real numbers values except 2.

The value of (f/g)(5) is 270

Step-by-step explanation:

4 0
2 years ago
Please help! I'll mark it as brainliest
Drupady [299]
These are the answers with the picture of square root of 64 as number 1
1) 8
2) 81
3) 5
4) 41
5) 6
6) 4
7) 19
8) 30
9) 19
10) 20
11) 7
12) 68
13) 20
14) 65
15) 6
16) 6
4 0
2 years ago
Keith sold half of his comic books and then bought nine
Nadusha1986 [10]

Answer:

22 comic books.

Step-by-step explanation:

(20 - 9) * 2 First subtract 9 from 20

11 * 2 Multiply 11 by 2

22 is the product

3 0
3 years ago
Phil collected data from several of his friends about the number of hours they spent sleeping and the number of hours they spent
Virty [35]

Answer:

B

Step-by-step explanation:

plz give brainliest i have never got it

5 0
3 years ago
Read 2 more answers
A package of 10 batteries is checked to determine if there are any dead batteries. Four batteries are checked. If one or more ar
frutty [35]

Answer:

There is a probability of 76% of not selling the package if there are actually three dead batteries in the package.

Step-by-step explanation:

With a 10-units package of batteries with 3 dead batteries, the sampling can be modeled as a binomial random variable with:

  • n=4 (the amount of batteries picked for the sample).
  • p=3/10=0.3 (the proportion of dead batteries).
  • k≥1 (the amount of dead batteries in the sample needed to not sell the package).

The probability of having k dead batteries in the sample is:

P(x=k) = \dbinom{n}{k} p^{k}q^{n-k}

Then, the probability of having one or more dead batteries in the sample (k≥1) is:

P(x\geq1)=1-P(x=0)\\\\\\P(x=0) = \dbinom{4}{0} p^{0}q^{4}=1*1*0.7^4=0.2401\\\\\\P(x\geq1)=1-0.2401=0.7599\approx0.76

8 0
3 years ago
Other questions:
  • Categorize the graph as linear increasing, linear decreasing, exponential growth, or exponential decay.
    13·2 answers
  • True or False<br> The geometric mean of 8 and 2 is 4.
    9·2 answers
  • Find the indicated sum. Select your choice and click Submit to check your answer.
    5·1 answer
  • in simba the temperature was 6°c in the morning on a particular day . What was the temperature during the night if it further dr
    10·1 answer
  • What is x in this equation- 3/2x-7=-11
    14·1 answer
  • What is the following product? Assume x&gt;0 and y&gt;0 v5x^8y^2•v10^3•v12y
    15·1 answer
  • Show work please and thanks
    15·2 answers
  • Rearrange<br> x= v+5<br> to make v the subject.
    6·2 answers
  • Three integers have a mean of 7, a median of 6 and a range of 13.<br><br> Find the three integers.
    15·1 answer
  • Simplify the rational expression <br> x^4 y^2/xy^7.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!