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
Kisachek [45]
3 years ago
13

What is the sum of the first 30 terms of this arithmetic sequence? 6,13,20,27,34

Mathematics
1 answer:
Galina-37 [17]3 years ago
4 0

Answer:

3135

Step-by-step explanation:

Givens

a1 = 6

Use t4 - t3 to get d

t4 = 27

t3 = 20

Step One

Find a1 and d

a1 = 6

d = t4 - t3

d = 27 - 20

d = 7

Step Two

Find the 30th Term

tn= a1 + (n -1 )*d

t30 = 6 + (30 - 1) * 7

t30 = 6 + 29*7

t30 = 6 + 203

t30 = 209

Step Three

Find the sum using Sum = (a + t30)*n/2

n = 30              given

a1 = 6               given  

t30 = 209         calculated from step 2

Sum = (a1 + t30)*n/2        Substitute

Sum = (6+ 209)*30/2       Combine like terms and divide by 2

sum = 215 * 15                  Multiply

Sum = 3135                      Answer

You might be interested in
What is the answer to 2x+5y=16
emmasim [6.3K]

Answer:

Option C -

Given : AB and BC form a right angle at point B. If A = (-3, -1) and B = (4, 4).

To find : What is the equation of BC ?

Solution :

AB and BC form a right angle at point B.

A=(-3,-1)  and  B=(4,4)

The slope of line AB is

Step-by-step explanation:

Hopfully this helped, if not HMU and I will get you a better answer

-Have a great day! :)

6 0
4 years ago
Read 2 more answers
2 couches against the wall
Alona [7]
4/9 + 1/5 (common denominator is 45)
20/45 + 9/45 = 29/45
5 0
3 years ago
I need help on the Math question?
mrs_skeptik [129]

Answer:

The answer is D.

Step-by-step explanation:

3x*3x = 9x^2

3x*2= 6x

5*3x=15x

5*2=10

6x+15x=21x

9x^2+21x+10

3 0
3 years ago
Find the value of 3a + 2b -3 when a=-5 and b=-6
UNO [17]

Answer:

-30

Step-by-step explanation:

Substituting values of a and b in equation

3(-5)+2(-6)-3

-15-12-3

-15-15

-30

4 0
3 years ago
Read 2 more answers
I really need help here, will u help me plz??
kvasek [131]
A and C are the only ones who could work...

Because 16+16=32 2+2=4 so 4 counselors to 32 campers 

16+16+16=48 and 2+2+2=6 so 48 campers to 6 counselors could also work.
5 0
3 years ago
Other questions:
  • How do you graph Y=4x-8 on a graph
    15·1 answer
  • Two lines are graphed on a coordinate grid as shown
    7·1 answer
  • for homework create your own inequality below that represents a real word situation.solve your problem in to two ways , one corr
    6·1 answer
  • State the name of the sampling method used in each of the following scenarios.
    7·1 answer
  • If the probability of something is 1 it
    13·1 answer
  • I need this answer as soon as possible
    13·1 answer
  • Mhanifa can you please help? Thanks :)
    5·1 answer
  • Can anyone plzz tell me the reasons for this false ones <br> Plzz help
    11·1 answer
  • Gabriel was out at a restaurant for dinner when the bill came. His dinner came to $20. After adding in a tip, before tax, he pai
    7·1 answer
  • . If there are 20 girls in a class of 30 students, find out the percentage of boys in the class?​
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!