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
Andrej [43]
3 years ago
14

The sum of the first 6 terms of a geometric series is 15,624 and the common ratio is 5.

Mathematics
1 answer:
nikitadnepr [17]3 years ago
5 0

Answer:

  4

Step-by-step explanation:

The sum of n terms of a geometric series with first term a1 and common ratio r is given by ...

  Sn = a1·(r^n -1)/(r -1)

for r=5 and n=6, this becomes ...

  15624 = a1·(5^6 -1)/(5 -1) = a1·(15624/4)

Then we have ...

  1 = a1/4 . . . . . divide by 15624

  4 = a1 . . . . . . multiply by 4

The first term of the series is 4.

You might be interested in
Help i dont know this one
BlackZzzverrR [31]

Answer:

line intersection postulate I think.

<h2><u><em>Could I please have BRAINLIEST?</em></u></h2>
3 0
3 years ago
Find the value of the missing variables.
dsp73

Answer:

x^{\circ}=35^{\circ}\\ \\y^{\circ}=55^{\circ}

Step-by-step explanation:

The measure of arc which the right triange cuts from the circle is 70^{\circ}, this means the central angle has the same measure.

Angle with measure x^{\circ} is inscribed angle subtended on the given arc. Its measure is half the measure of the central angle, hence

x^{\circ}=\dfrac{1}{2}\cdot 70^{\circ}=35^{\circ}

Angles with measures x^{\circ} and y^{\circ} are complementary angles (add up to 90°), so

y^{\circ}=90^{\circ}-35^{\circ}=55^{\circ}

6 0
3 years ago
IF NOT CORRECT I'M REPORTIN YOU!!! pair of pants with a marked price of $35.00 has a discount of 20%. How much is the discount?
Lemur [1.5K]
It <span>A. $7.00!!!!!!!!!!!!!
</span>
7 0
3 years ago
Read 2 more answers
G.O has 3 orange picks for every 2 green. If there are 25 picks in all, how many picks are orange?
Tomtit [17]

There will be 15 orange pickles and 10 green picks

3 0
3 years ago
Hii plss helpp quick i have 3 minn
Alexandra [31]
1) 2.625 miles
2) 5.9 miles
8 0
2 years ago
Other questions:
  • You guys listed "1" fraction of the two fractions between: 3/5 and 4/5? What is the other ones? Also, someone else said these an
    8·1 answer
  • A basket of fruit contains 4 bananas, 3 apples, and 5 oranges. You intend to draw a piece of fruit from the basket, keep it, dra
    12·1 answer
  • Which type of employer could offer a 403(b) retirement plan to its employees?
    10·2 answers
  • What is the true solution to In 20+In 5= 2 In x?<br><br>#31<br>​
    14·1 answer
  • The following data are for 30 observations involving two categorical variables, x and y. The categories for x are A, B, and C; t
    7·2 answers
  • Which of the following could not be the lengths of sides of a right triangle?
    12·1 answer
  • Write an equation for the relationship shown in the table. E 0 2 3 -0.3 3.7 5.7​
    13·1 answer
  • When the angle of elevation to the sun is 42 a flagpole casts a shadow that is 21 ft long. What is the height of the flagpole to
    7·1 answer
  • Cherry bought two cupcakes and got $13 back Sonia bar for cupcakes and got six dollars back in the each pay with the same amount
    9·1 answer
  • I need help with this math problem
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!