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
Karo-lina-s [1.5K]
3 years ago
7

What is the sum of the first 26 terms of the arithmetic series?

Mathematics
2 answers:
ch4aika [34]3 years ago
7 0
The first term is 7, and the common difference is 4. We know this because 11-7=15-11=4. So the nth term is going to be 7+4(n-1). The 26th term will be 7+4(26-1)=7+100=107. The sum of the series is going to be (107+7)*13=1482.
mestny [16]3 years ago
4 0
A(1) =7
d=11-7= 4
a(26)= a(1)+d(n-1)= 7+4(26-1)=7+100=107

S(n)=  (n/2)*(a(1) +a(n))
S(26)=(26/2)*(7+107)=13*114=1482
S(26)=1482
Answer: 1482

You might be interested in
The speed limit sign on the freeway said 110 kilometers per hour, but the speedometer on Cesar's car is calibrated in miles per
Lisa [10]

Answer:

68.2 miles per hour

Step-by-step explanation:

Speed limit = 110 kilometers per hour

1 kilometer = 0.62 miles

110 kilometers = x miles

Cross product

1*x = 0.62*110

x = 68.2 miles

Cesar should drive at 68.2 miles per hour to avoid a speeding ticket

110 kilometers per hour = 68.2 miles per hour

6 0
2 years ago
Sweet T has 2 orange picks for every 5 green. If there are 12 picks in all how many picks are orange
e-lub [12.9K]
There are eight orange picks.
4 0
3 years ago
Question 1. Solve using linear combination
Natali5045456 [20]
1) 4d = 24
d = 6
answer d

2) 4d = 12
d = 3
answer c

3) y = 0
ordered pair: (-5 , 0)

Hope this helps!
4 0
3 years ago
Which ordered pair is a solution of the equation shown?<br><br> 25 points
Dahasolnce [82]

Answer:

4y-2 / 3

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
Based on the dotplot of the simulation results and the
Sonbull [250]

Answer:

The conclusion to be drawn is:

The actual proportion of teenagers who do not smile  is only 8%.  It is clear that exactly 6 out of 10 teenagers will smile  in their driver's license photo.

If we continued to take more samples of 10  teenagers, the center of the distribution would shift to

Step-by-step explanation:

4 0
3 years ago
Other questions:
  • Can anyone pleas help​
    11·1 answer
  • Two spinners are spun 20 times. A sum of 7 is landed on 5 times. What is the experimental probability of spinning a sum of 7?
    12·1 answer
  • The range of the function f(k) = k2 + 2k + 1 is {25, 64}. What is the function’s domain?
    8·1 answer
  • Emily has saved $6.75 and $4.25 from her lawn mowing jobs. How much more does she need to save to buy a CD that costs $15.95?
    8·1 answer
  • At a school the number of boys : number of girls = 11 : 9.
    5·2 answers
  • A rectangle that is 30 inches long by 10 inched wide can be divided into three equal squares.
    11·1 answer
  • Pleaseee help answer correctly !!!!!!!!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!!!!!!!!
    5·1 answer
  • Need help plsssssssss
    13·1 answer
  • Find the volume of the solid<br><br><br><br> The problem is in the picture!!!!!!!!!
    5·1 answer
  • PLEEEEEEEEASE HELPPPP <br> i have to do this last problem but i only have 2 minutes left!!!!!!!!!!
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!