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
Nikolay [14]
3 years ago
15

S=n(a1+an)/2 gives the partial sum of an arithmetic sequence. What is the formula solved for an?

Mathematics
2 answers:
Veseljchak [2.6K]3 years ago
6 0
S = n(a1 + an)/2
2S = n(a1 + an)
2S = na1 + nan
nan = 2S - na1
an = (2S - n a1)/n
Oksana_A [137]3 years ago
5 0

Just took the quiz.

The answer is an=2S-a1n/n

You might be interested in
Pls help me with these math problems
user100 [1]
2. W<5
4. D<6 (or equal to)

3 0
3 years ago
Read 2 more answers
All points on a given line have their y-coordinate as 9. What is the equation of this line? A. x + y = 9 B. x – y = 9 C. x = 9 D
Phoenix [80]

D. y = 9 because it has a complete zero slope while the y-intercept of the equation is 9, so the equation is y = 9.

4 0
3 years ago
Read 2 more answers
Please help.<br><br> Best answer will get brainliest.
nikdorinn [45]

Answer:

59.1 for the mean

Step-by-step explanation:

You add all the numbers together and divde it by the amount of numbers there are.

7 0
3 years ago
Read 2 more answers
Suppose the average price for new cars in 2012 has a mean of $30,100 and a standard deviation of $5,600. Based on this informati
KatRina [158]

Answer:

($13,300,$46,900)

Step-by-step explanation:

We are given the following in he question:

Mean, μ = $30,100

Standard Deviation, σ = $5,600

Chebyshev's Theorem:

  • According to  theorem atleast 1 - \dfrac{1}{k^2}  percent of data lies within 2 standard deviations of mean.
  • For k = 3,

1 -\dfrac{1}{(3)^2} = 0.889 \approx 89\%

Thus, 89% of data lies within three standard deviation of mean.

\mu - 3(\sigma) = 30100 - 3(5600) = 13300\\\mu + 3(\sigma) = 30100 + 3(5600) = 46900

Thus, we expect at least 89% of new car prices to fall within ($13,300,$46,900)

3 0
3 years ago
The ratio of red paint to blue paint is 2:1. What does the ratio 2:1 mean?
Artemon [7]
This means the for every 2 units of red paint, there is 1 unit of blue paint
exg
in a mixture, mix a red and blue paint to get a type of purple that is the ratio of 2:1 (red:blue)
so exg if you wanted 3 gallons you would do 2 gallons of red+1 gallon of blue since 2+1=3
it could also mean quantity
there are 2 tiles painted red for every 1 tile painted blue resulting in 2 unit of red paint to 1 unit of blue

4 0
3 years ago
Other questions:
  • Use properties of addition and subtraction to evaluate the expression. -19 - 53 - 31 Enter your answer in the box.
    7·2 answers
  • Please help me with pythagoras.
    14·1 answer
  • Use substitution to solve the system of linear equations. In your final answer, include all of your work.
    11·1 answer
  • 5/3 divided by 4/9 is?
    5·2 answers
  • When sampling without replacement from a finite population of size N, the following formula is used to find the standard deviati
    7·1 answer
  • Jasmine can oil the lanes in a bowling alley in 10 hours. One day her friend joe helped her and it only took 4.44 hours. Find ho
    7·1 answer
  • Which term matches the definition? one that can be answered with
    13·1 answer
  • I will give 20 points!!! Please answer this!!!!!!!!!!!!!!!!!!!!!!!!!!!! this is confusing, my math instructions say "Factor out
    14·1 answer
  • Determine the angle of rotation<br><br> please help. and provide explanation
    5·1 answer
  • On most state highways, the fine for speeding depends on the speed of the car. In a certain state, suppose the fine as a functio
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!