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
Strike441 [17]
4 years ago
6

How many terms are there in a geometric series if the first term is 7, the common ratio is 2, and the sum of the series is 105?

Mathematics
1 answer:
uysha [10]4 years ago
4 0

105  =  7. (1 - 2^n) / 1-2

105*-1 = 7 (1 - 2^n)

1 - 2^n = -105/7 = - 15

2^n = 16 

n = 4 answer
You might be interested in
What x and y equal to
Papessa [141]

Answer:

X = 4, Y = 3.

Explanation:

Since the length of side CK is equal to the length of WM, then you can make the equation 6y-4 = 18. then you just add 4 to each side and divide both sides by six to get 3. Same thing for the other equation. Angle (i think its an angle due to its placement) C is equal to angle M, so you can make the equation 3x + 7 = 19. Subtract seven from both sides then divide by 3 to get 4. Tell me if you have any questions :)

6 0
3 years ago
Read 2 more answers
In degrees, what is the sum of the exterior angles of a square?
Rom4ik [11]
The sum exterior angles of a square are:
4*90=360°

8 0
3 years ago
Read 2 more answers
Please help .. with this.. it’s math.. asap
alekssr [168]
Option D. ..........………
4 0
3 years ago
Read 2 more answers
Six tools are in a bag – a hammer, wrench, drill, pliers, screwdriver, and measuring tape. You are trying to find the probabilit
Vesna [10]
You could roll a 6-sided die 3 times to simulate this.  This is a good simulation because it has one side for each possible tool, and each roll is independent, just as selecting the tool with replacement would be.
3 0
3 years ago
Read 2 more answers
Help please.! and thank you
Alexxx [7]

Answer:

common difference is 4

Step-by-step explanation:

12-4=8

8-4=4

8 0
2 years ago
Other questions:
  • Hope you can read those plz help me
    11·1 answer
  • How to reduce to lowest form <br>1/4 + 2/5
    6·2 answers
  • A scale drawing of Joshua's living room is shown below:
    8·2 answers
  • -85 - 8x =2x + 115 anyone know how to do this??
    7·2 answers
  • When an object accelerates, it changes its
    7·1 answer
  • DUE IN 2 MINUTES PLSSSS HELP
    11·1 answer
  • The area of a circle is 25π in². What is the circumference, in inches? Express your answer in terms of \piπ.
    8·2 answers
  • Simplify the expression<br> 1/2x+3-1/4x-3
    5·1 answer
  • Round 468986 to the nearest thousand
    6·2 answers
  • HELP HELP me find the missing answers
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!