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
Rita received a $90 gift card for a coffee store. She used it in buying some coffee that cost $8.07 per pound. After buying the
laila [671]
Subtract 41.58 by 9 then devide that number by 8.07 to get the amount of pounds purchased your answer is 6
7 0
3 years ago
Write an integer for the situation.<br> A plane ascended 34,200 feet.
lesya692 [45]

Answer:

34,200

Step-by-step explanation:

Ascend means up so it's positive.

6 0
3 years ago
What is a linear function on a graph
JulijaS [17]

Answer:

Step-by-step explanation:

A straight line that has one independent variable and one dependant variable.

6 0
3 years ago
Read 2 more answers
What is the volume of papers that the tray can hold?
Vesna [10]
What tray..there is not enough information to help you
6 0
3 years ago
Read 2 more answers
17 &lt; 2x + 7 &lt;29*<br> Your Inswer
borishaifa [10]

Answer:

5<x<11

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Other questions:
  • What is the equation, in slope-intercept form, of the line that passes through (0, 3) and has a slope of −6??
    8·1 answer
  • A space is shaped like a parallelogram with the base of 26 feet and the height of nine what is the area
    15·2 answers
  • Two carpenters are building a fence after 5 minutes,one carpenter is finished 4/7 of the way an the other is finished 1/8 of the
    6·1 answer
  • Swimsuit discounted 65% on sale for $20.30
    15·1 answer
  • 5 a. 32% of 881
    7·1 answer
  • Find the area of the circle shown below if the diameter is 24 inches. Use 3.14 for π. Use the formula π x r^2
    7·2 answers
  • Plz help no link thank you
    9·1 answer
  • Captain Salamander has a lazy time on the trip and spends about 15 hours a day sleeping. What fraction of the day does he spend
    14·1 answer
  • Atasha jumped 2 1/5 meter in a long jump competition. Arya jumped 1 2/3 meter. Who jumped longer and how many meters?​
    10·1 answer
  • The function — is used to model the height of an object projected in the air, where h(t) is the height in meters and t is the ti
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!