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
Grace [21]
3 years ago
13

3. The first four terms of a sequence are:

Mathematics
2 answers:
iren2701 [21]3 years ago
3 0

Step-by-step explanation:

tn=n(n+1)(2n+1)

t23=23(23+1)(2*23+1)

t23=36754

tatiyna3 years ago
3 0

Answer:

The 23rd term is 2806.

Step-by-step explanation:

The other answerer has used the formula but i'm answering from the assumption that T1 to T4 are correct.

Each term is the sum of n terms of an arithmetic series with first term a1 = 12 and common difference d = 10.

Sum of n terms = (n/2)[2a1  + d(n - 1)]

So the sum of 23 terms =

= 23/2 (2*12 + 10 * 22)

= 11.5 * 244

= 2806.

You might be interested in
Diane's Tree Trimming Service has trimmed hundreds of trees in the Greater Denver area. The time it takes to trim a tree is norm
kkurt [141]

Answer:P(28.5And we can find this probability with this difference:

P(-0.7

And in order to find these probabilities we use tables for the normal standard distribution, excel or a calculator.

P(-0.7

So then the best answer would be 21.82 %

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Solution to the problem

Let X the random variable that represent the time it takes to trim a tree of a population, and for this case we know the distribution for X is given by:

X \sim N(32,5)  

Where \mu=32 and \sigma=5

We are interested on this probability

P(28.5

And the best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\sigma}

If we apply this formula to our probability we got this:P(28.5And we can find this probability with this difference:

P(-0.7

And in order to find these probabilities we use tables for the normal standard distribution, excel or a calculator.

P(-0.7

 So then the best answer would be 21.82 %

8 0
3 years ago
The four highest scores on the floor exercise at a gymnastics meet were 9.685, 9.28, 9.366, and 9.5 points.
DaniilM [7]

Answer:

9.28 is lowest

9.685 is highest

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
What is 4 2/3 plus 1 6/9 (simplify)
aliina [53]

Answer:

423

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
Can someone help out? or explain? ​
Nataliya [291]
Y = 90 degrees

1) The angles on a straight line add to 180 degrees so 180-110= 70 degrees.

2) The angles in a triangle add to 180 degrees so 70+70= 140 degrees. The angle at the top of the triangle will have to be 40 degrees as 140+40= 180 degrees.

3) As x is half the angle at the top of the triangle (40 degrees), x will equal 20 degrees.

4) As the angles in a triangle add to 180 degrees 20+70=90 degrees 180-90=90 degrees.

5) Answer = 90 degrees

7 0
2 years ago
A , B, C , D probability
BlackZzzverrR [31]

Answer:

your laptop is nice really

4 0
3 years ago
Other questions:
  • A cube has volume 15 625 cm3. what is the surface area of the cube?
    11·1 answer
  • 1,6,6,9,2,1,6,2<br> Drawing an odd number, then drawing a 6
    7·1 answer
  • If f(x)=2x^2+1, what is f(x) when x =3 <br>A)1<br>B)7<br>C)13<br>D)19​
    13·1 answer
  • Kona has 400 shares of Stock A and 500 shares of Stock B . She gains three dollars per share from Stock A and loses two dollars
    14·1 answer
  • When rolling two fair, standard dice, what is the probability that the sum of the numbers rolled is a multiple of 3 or 4?
    10·1 answer
  • 3. A waiter earns $30 in wages plus 15% in tips
    13·1 answer
  • How far does a bus travel in 2.5 hours at 65 miles per hour​
    8·2 answers
  • A recipe used 2/3 cup of sugar for every 2 teaspoons of vanilla. How much sugar was used per teaspoon of vanilla?
    7·1 answer
  • HELP!! ASAP FOR BRAINLIEST!!!
    12·1 answer
  • Please help guys I need to pass my semester final exam!
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!