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
Law Incorporation [45]
3 years ago
9

Which series has a sum of 20?

Mathematics
1 answer:
alexandr402 [8]3 years ago
5 0

Answer:

  see below

Step-by-step explanation:

The sum of an infinite series with first term "a" and common ratio "r" is ...

  S = a/(1 -r) . . . . . for |r| < 1

Then the sums for the given answer choices are ...

  A: 5/(1 -3/4) = 20 . . . . . the answer of choice

  B: 4/(1 -5/6) = 24

  C: 4/(1 -1/5) = 5

  D: 10/(1 -1/5) = 12.5

You might be interested in
Tessa received $50 from her Grandma for her birthday. She decided to put this money away and save an additional $12 per week so
sweet [91]

Answer:

29 weeks.

Explanation:

398-50= 348

348 divided by 12= 29

She has to save up for 29 weeks to get her tablet.

4 0
3 years ago
Simplify the followin expression.x^4+3x^3-2x^3-5x^2-x+x^2+x+1+7x^4
REY [17]

Answer:

8 x^ 4  +  x^ 3  −  4x^2  +  1

Step-by-step explanation:

7 0
3 years ago
You can buy 5 stickers for $3. Write a proportion that gives the<br> cost c if you buy 12 stickers.
Reptile [31]

Answer:

$7.5

Step-by-step explanation:

Let

Quantity of stickers=x

Price of stickers=y

5 stickers cost $3

12 stickers cost $y

x/y = x/y

5/3 = 12/y

Cross product

5y=12*3

5y=36

Divide both sides by 5

5y/5 = 36/5

y=7.5

12 stickers= $7.5

Therefore, the price of 12 stickers= $7.5

5 0
3 years ago
Given the function k(t) = 6t − 9,<br> complete the following Solve k(t) = 21.
ELEN [110]

Answer: 5(k)

Step-by-step explanation: “k”times “t” equals 6t-9 so if “k” times “t” equals 21, 6t-9=21, add 9 to 21 which equals 30 so then you divide 30 by 6 to get 5. “t”=5 which means the solution is 5(k)

(I’m just a sixth grader dont blame me if I couldn’t do this)

7 0
3 years ago
F(-7) if f(x) = 8x 15
scoray [572]
All you do is plug in -7 so you get f(x)=8(-7)*15 you get -56*15 which goes to -840
3 0
3 years ago
Other questions:
  • Who is traditionally seen as the inventor of linear perspective?
    10·1 answer
  • HELP What is the sum of 1000x and 2000x
    11·2 answers
  • A rectangular pan has a length that is 4/3 the width. The total area of the pan is 432 in.2. What is the width of the cake pan?
    10·2 answers
  • Does a triangle with the sides of 25 cm, 24 cm, and 7 cm form a right triangle?​
    15·1 answer
  • In 2010, it cost $3.29 for a gallon of milk, while in 2000, the cost was $2.69.
    10·2 answers
  • Find the surface area of a rectangular solid with dimensions of 6 by 2 by 3 centimeters
    7·1 answer
  • Please help, it's due today!!!
    7·1 answer
  • A hexagon can be divided into how many triangles by drawing all of the diagonals from one vertex?
    6·2 answers
  • Have a nice day/night, you guys.
    5·1 answer
  • PLEASE HELP!! WORTH 69 POINTS
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!