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
salantis [7]
4 years ago
7

If the fourth term of a gwometric progression is -27/4 and the fifth term is 81/4 find a1 and r

Mathematics
1 answer:
Mazyrski [523]4 years ago
4 0

Answer:

  • a1 = 1/4
  • r = -3

Step-by-step explanation:

r = a5/a4 = (81/4)/(-27/4) = -3

an = a1·r^(n-1)

-27/4 = a1·(-3)^3 = -27·a1 . . . . fill in the known numbers for n=4

(-27/4)/(-27) = a1 = 1/4

You might be interested in
A friend is in 5th grade math and asks you to explain exponents with example. What do you say?
Vesnalui [34]

Answer:

If my friend is in 5th grade and they need an example on exponents I would show them something like this 7 to the 3 power would be equal to 7 times 7 times 7 which also equals 343 or 4 to the 4th power would be equal to 4 times 4 times 4 times 4 which equals 256

Step-by-step explanation:

This is a simpiler way to show a younger student how to figure out exponents also. Have a great day :D  

If you need help me and my older brother both share this account.

4 0
4 years ago
GEOMETRY Help !! Which term describes the red curve in the figure below?
AleksandrR [38]
It is an elipse 
D is the answer
7 0
3 years ago
Ohhhhhh!!! I have a math problem I also have a Brainliest
Step2247 [10]
For 6 plug in each of the answers for x and see if the product =3.2
Answer for 6: A
For 7 you turn the percentage into a decimal and multiply that by the number in which you know and you find the answer.
Answer for 7: D 
4 0
3 years ago
Read 2 more answers
a plastering contractor charges $18 per square yard( that is $2 per square foot). what is the cost of plastering 100 feet of wal
Tomtit [17]
Basically, this problem is going to require you to solve for the area and multiply it with the given cost unit.

Area = Length*Height
Area = 100 ft * 8 ft = 800 ft²

Total Cost = (Unit Cost)(Area)
Total Cost = ($2/ft²)(800 ft²)
<em>Total Cost = $1,600</em>
4 0
4 years ago
A real estate broker sold your house for $72,000. The broker's commission was 6% of the selling price. How much would you get fo
Jobisdone [24]
The answer is c because 72,000-6% =67680
8 0
3 years ago
Other questions:
  • Which distance is about 3 x 10-5 meters?
    13·1 answer
  • Which of these answers is closest to zero-2, 0.2, 1, 1/2
    12·1 answer
  • What is the prime number 14 13 21 33
    9·1 answer
  • What is the inverse of the function g(x)=-\dfrac{2}{3}x-5g(x)=− 3 2 ​ x−5g, left parenthesis, x, right parenthesis, equals, minu
    8·1 answer
  • If f(x)=6x-9, find f(4)
    8·2 answers
  • How many cars can you wax with 1 bottle of wax
    8·1 answer
  • Help lol sjdnwkfnnsnfnsndnwmdn
    12·1 answer
  • Factorising <br><br> factorise 8p - 4
    8·2 answers
  • I need help..Please make it correct..
    11·1 answer
  • 1 1/4 x 3/4 as a fraction
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!