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
miskamm [114]
3 years ago
11

What is the first term in a geometric sequence if the common ratio is −4 and the sum of the first four terms is −255?

Mathematics
1 answer:
posledela3 years ago
8 0
Sn=A1(1-r^n)/(1-r)
Sum of a finite geometric series formula
We know the sum, number of terms and rate, so you plug those in.
-255=A1(1-(-4)^4))/(1-(-4)
-255=A1(1-256)/5
-255=A1(-255)/5
-1275=A1(-255)
5=A1

Hope this helped! Let me know if you have any questions.
You might be interested in
Help needed and ASAP!!!!!!!!!!!!!!!!!!!
djverab [1.8K]

Answer:

how are angle a and b related how are angle c and d related.

Step-by-step explanation:

this will tell you the order they are in.

4 0
3 years ago
Read 2 more answers
Omar has a gift card for $40.00 at a gift shop. Omar wants to buy a hat for himself for $13.50. For his friends, he would like t
stealth61 [152]

Answer:

A. 3.25x + 13.50 ≤ 40

The number of bracelets is x. It's a variable.

The 13.50 is a constant.

The total needs to be less than or equal to 40 because that's all the money he has.

6 0
2 years ago
Read 2 more answers
PLS HELP AS SOON AS YOU CAN!!!....
N76 [4]

Answer:

I would say B because there are 15 1s


5 0
3 years ago
Simplify 10 divided by 7 divided by 8 and put it in a fraction please :)
NeX [460]

Answer:5/28

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Which ratio forms a proportiona with 5:15?<br><br> A: 10:20<br> B: 75:5<br> C: 3:1<br> D: 1:3
Nata [24]

Answer:

C

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Other questions:
  • I need help with this plz help someone plz help me plz as soon as possible plz ASAP
    10·2 answers
  • You borrow bookcases to display 943 books. You plan to put 22 books on each shelf. There are 5 shelves. How many bookcases do yo
    14·1 answer
  • The volume of a gas varies inversely as the pressure upon it. If the volume of the gas is 160 cubic centimeters at a pressure of
    8·1 answer
  • Can someone help me asap? Ik it’s easy but not good at maths lol
    12·2 answers
  • (please explain)
    8·2 answers
  • A basket contains 8 green apples, 11 red apples, 5 peaches, and 12 oranges. Roger randomly chooses a piece of fruit, wats it, th
    14·1 answer
  • On Monday the high was 60 degrees Fahrenheit. On Tuesday, the high was 18% more. How much did the high increase from Monday to T
    7·2 answers
  • Which one? I need help
    13·1 answer
  • What is the value of x in triangle PQR below?
    6·1 answer
  • The LCM of 6, 17 and 34 is
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!