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
IceJOKER [234]
3 years ago
12

A1=1 , an= 4a n-1 -1

Mathematics
1 answer:
Readme [11.4K]3 years ago
4 0
<span>for part (a) find the sum of the first n terms of the arithmetic series. for part (b) find n for the given sum Sn.
45. 3+8+13+18+23+...
a. n=20
b. Sn=366
46. 50+42+34+26+18+...
a. n=40
b. Sn=182
47. -10+(-5)+0+5+10+...
a. n=19
b. Sn=375
48. 34+31+28+25+22+...
a. n=32
b. Sn=-12
49. 2+9+16+23+30+...
a. n=68
b. Sn=1661
50. 2+16+30+44+58+...
a. n=24
b. Sn=2178
</span>
You might be interested in
My first expression answer is y=5 -2x How do I plug it into x-y=1 ?? The Y
Lemur [1.5K]

Answer:

All you need to do is make sure the first expression is solved for y (which it is), and then substitute it into the second expression in place of any occurrences of y:

given the second expression:

x - y = 1

We'll replace y with it's value in the first expression:

x - (y) = 1

x - (5 - 2x) = 1

Now we can expand the resulting equation:

x - 5 + 2x = 1

So <em>neither</em> of the answers provided are correct.

You can then solve for x:

x - 5 + 2x = 1

x - 5 + 5 + 2x = 1 + 5

x + 2x = 6

3x = 6

3x/3 = 6/3

x = 2

After that, you can find y by plugging x into either of the two original equations:

y = 5 - 2x

y = 5 - 2(2)

y = 5 - 4

y = 1

8 0
2 years ago
Which is the easiest way for you to understand the relationship between distance and time: graph, table, or equation? Explain!
Romashka-Z-Leto [24]

Answer:

graph =) isnxjxushxxhsizuxbsuzuxheisixjxjxizzoz

8 0
3 years ago
Read 2 more answers
Which geometric figures are drawn on the diagram? Check all that apply.
andrey2020 [161]

Answer:

I think it should be triangle

8 0
2 years ago
Right angle are known as the
marissa [1.9K]
Right angle are known as exactly 90 degrees corresponding to a quarter turn.
8 0
2 years ago
Read 2 more answers
Can you please help with these questions? I need to finish homework by tonight.
noname [10]
Length x width is the formula.
so 18 x 18 for 7.
22 x 24 for 8.
and 8 would probably be 5 x 5 to equal 20. so the length and width would be 5 and 5 because 20 is the area
3 0
2 years ago
Other questions:
  • Mandy collected 4 times as many shells as Cameron. Together they collected 40 shells. How many shells did Mandy collect. Write a
    10·1 answer
  • Write an equation that represents each mixed number as a sum of whole numbers and unit fractions. 1/ 5/6
    15·1 answer
  • Which of the following is a composite number? <br> A 1 <br> B 0 <br> C 63 <br> D 19
    15·2 answers
  • This Venn diagram shows sports played by 10 students
    12·2 answers
  • Every 7 pages of an​ author's manuscript correspond to 2 published pages. How many published pages will a 182​-page manuscript​
    6·1 answer
  • Estimate the product of 54x68
    14·2 answers
  • How to do you solve c/3=30/5
    6·1 answer
  • Which of the following human activities most likely resulted in the
    9·2 answers
  • Can you help plz<br><br> EEEEEEEEEEEEEEEEEEEEEE
    6·2 answers
  • If r is an integer greater than 1, what is the value of (-1)^r+1 if:<br><br> r is an even integer
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!