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
wlad13 [49]
3 years ago
6

THE CORRECT ANSWER WILL GET BRAINLYEST AND EXTRA POINTS!!!

Mathematics
2 answers:
BaLLatris [955]3 years ago
6 0

Answer: A) 4n² - 3n

Step-by-step explanation:

The formula for determining the sum of n terms of an arithmetic sequence is expressed as

Sn = n/2[2a + (n - 1)d]

Where

n represents the number of terms in the arithmetic sequence.

d represents the common difference of the terms in the arithmetic sequence.

a represents the first term of the arithmetic sequence.

Looking at the given sequence,

a = 1

d = 9 - 1 = 17 - 9 = 8

Therefore, the formula for the sum of the first n terms in this series would be

Sn = n/2[2 × 1 + (n - 1)8]

Sn = n/2[2 + 8n - 8]

Sn = n/2[ 8n - 8 + 2]

Sn = n/2[ 8n - 6]

Sn = 4n² - 3n

Natalka [10]3 years ago
3 0

1st nth sum is given by:

n ----   Sum                           Expression

1 ----    1                           --- 4*1^2 -3*1

2 ----    1+9 = 10               --- 4*2^2 -3*2

3 ----    1+9+17 = 27         --- 4*3^2 -3*3

4 ----    1+9+17+25 = 52   --- 4*4^2 -3*4

Therefore, the best expressions is;

Sum of 1st nth terms = 4n^2 - 3n

Then,

The correct answer is A.

You might be interested in
Dot plots are often used for what 2 sets of data
emmainna [20.7K]

Answer:

categorical or quantitative data

Step-by-step explanation:

6 0
3 years ago
Name the marked angle in 2 different ways.
Ganezh [65]

Answer:

Right angle, and angle IJK

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
Harold bought 20 toys for his nieces and nephews. The least expensive toy cost $6.19, and the most expensive toy cost $9.81. Whi
nikklg [1K]

Answer:

160 dollars

Step-by-step explanation:

So you would add 6.19 and 9.81 together. Then divide it by 2.  You would get 8. Then multiply it by 20 and you would get 160 dollars

8 0
3 years ago
Mary has 12 video games. She purchases five new video games each month as part of a video game club.
Oxana [17]

Answer:

The answer to your question is:  V = 12 + 5n

Step-by-step explanation:

Data

Video games right now = 12

She purchases 5 video games each month

Equation = ?

# of video games in n month = V

Process

           - Consider the initial amount of video games

                                   V = 12

           - Now, consider the number of video games the buys each month and the months

                                 5n

           - Finally, join both terms

                                  V = 12 + 5n

8 0
3 years ago
I am confused and it's due tomorrow
shusha [124]
That looks hard... I can see the attachment tho<span />
5 0
3 years ago
Read 2 more answers
Other questions:
  • Represent the following sentence as an algebraic expression, where "a number" is the
    13·1 answer
  • WILL MARK BRAINIEST! 25 POINTS! What is 2^4/3 equal to? ∛8 ²√8 ∛16 ²√16 Please show work, i need to understand this
    12·2 answers
  • The baby elephant weighs 435 pounds. what is its weight rounded to the nearest hundred pounds?
    12·2 answers
  • Solve the equation.<br> 9 = 9m<br> M=_____
    15·1 answer
  • Is (0,0) a solution to this system?
    9·1 answer
  • Which of the following allow electrons to flow easily?A. wood. B. plastic. C. copper. D. glass.
    13·1 answer
  • I require guidance please<br> Which of these statements are correct? Select TWO that apply.
    8·2 answers
  • I only need help with the third one​
    10·2 answers
  • Help me ASAP please!!!
    8·2 answers
  • The line passes through the point (3,0) and has a slope of -3
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!