• ### What happens at infinity?

21 answers · 3 days ago
• ### \$0.08 a minute is how many an hour?

17 answers · 2 days ago
• ### What is the square root of 18?

13 answers · 2 days ago
• ### The length of a bed is how many yards?

11 answers · 2 days ago
• ### A map is scaled so that 1 cm represents 25 km. How far apart are towns A and B if they are 9.7 cm apart on the map?

7 answers · 4 hours ago
• ### 6 x 358 =?

21 answers · 6 days ago
• ### What is relationship between volts and amperes?

11 answers · 2 days ago
• ### 5(x+2)=47 Explain how?

7 answers · 1 day ago
• ### Find the exact sum of the series. I know how to do most of it, but the first part I don't understand. Thanks.?

Best answer: Given , other answer is correct = 2/3 is sum of Σ (2/4^n) To expand on the other answer It is good if you respond to answer If you respond , great I understand how to do partial fractions and everything is clear. Then, we would know , you need no further help. If you responded, please provide more... show more
Best answer: Given , other answer is correct = 2/3 is sum of Σ (2/4^n)
To expand on the other answer
It is good if you respond to answer
If you respond , great I understand how to do partial
fractions and everything is clear.
Then, we would know , you need no further help.
If you responded, please provide more detail I don't
understand. Then, we would know to tell you more.
If you don't respond , we expect you don't really need any help.
Just in case, you didn't understand the advice given.
A/ (n) + B/ (n+2) = 2/ (n*(n+2))
(A*(n+2) + B*n ) = 2
2a +An +Bn = 2
a= -b
2a =2
a = 1
Σ 1/(n) - 1/(n+2) = (n+2 - n ) / (n*(n+2))
2/ (n(n+2)
1st part
becomes Σ 1/ (n) -1 / (n+2)
1/1 + 1/2 + 1/3 + 1/4 + 1/5 + .... -
(-1/3) - (1/4) -(1/5) - (1/6) + .....
(so all but the 1st 2 terms of 1st part, cancel out )
= 1 + 1/2 = 1.5
so total answer = 2/3 + 1 1/2 = 1 3/6 + 4/6 = 2 1/6
Sum = 2 1/6
6 answers · 14 hours ago
• ### It takes 5 people and 40 minutes to solve 20 problems, how many minutes will 8 people take to solve 40 problems?

Best answer: It takes 5 people and 40 minutes to solve 20 problems, so it takes 5*40 = 200 people•minutes to solve 20 problems, or 200/20 = 10 people•minutes/problem. To solve 40 problems will take (40 problems)•(10 people•minutes/problem) = 400 people•minutes. Therefore, it would take (400 people•minutes)/(8 people) = 50... show more
Best answer: It takes 5 people and 40 minutes to solve 20 problems, so it takes 5*40 = 200 people•minutes to solve 20 problems, or 200/20 = 10 people•minutes/problem.

To solve 40 problems will take (40 problems)•(10 people•minutes/problem) = 400 people•minutes. Therefore, it would take (400 people•minutes)/(8 people) = 50 minutes to solve 40 problems.

Ans: 50 minutes
9 answers · 2 days ago
• ### What is 2+2x4?

5 answers · 2 hours ago
• ### Can't figure the LCD?

Hello, I'm having trouble finding the LCD of 1/2x+2,1/4x+4.Thank you.
Hello, I'm having trouble finding the LCD of 1/2x+2,1/4x+4.Thank you.
4 answers · 10 hours ago
• ### What is the square root of two?

12 answers · 4 days ago
• ### What is the shortest day of the year?

6 answers · 17 hours ago
• ### 1/3 of 24 oranges are rotten,how many oranges are rotten? 2 how many oranges are not rotten?

8 answers · 2 days ago
• ### How many feet are in 7 yards?

12 answers · 4 days ago
• ### Why can't numbers be divided by zero?

Best answer: Zero represents nothing. A number divided by nothing remains the original number.
Best answer: Zero represents nothing. A number divided by nothing remains the original number.
9 answers · 3 days ago
• ### So here's an extremely simple math word problem I need help with. This is painfully easy, I'm just really stupid.?

If Andy wanted to make 13 paintings in 8 days, how many does he need to make per day?
If Andy wanted to make 13 paintings in 8 days, how many does he need to make per day?
5 answers · 2 days ago
• ### Given two points, A(-2,5) and B(-4,3) find the equation of the circle with diameter AB.?

Best answer: A(-2,5) and B(-4,3) :

midpoint:
x = (-2 - 4)/2 = -3
y = (5 + 3)/2 = 4

=> centre: (-3, 4)

distance, AB:
d = √((-2 - (-4))^2 + (5 - 3)^2)
d = √8 = 2√2

=> radius = 1/2 * 2√2 = √2

(x - (-3))^2 + (y - 4)^2 = √2^2
(x + 3)^2 + (y - 4)^2 = 2

https://www.desmos.com/calculator/g5nkto...
Best answer: A(-2,5) and B(-4,3) :

midpoint:
x = (-2 - 4)/2 = -3
y = (5 + 3)/2 = 4

=> centre: (-3, 4)

distance, AB:
d = √((-2 - (-4))^2 + (5 - 3)^2)
d = √8 = 2√2

=> radius = 1/2 * 2√2 = √2

(x - (-3))^2 + (y - 4)^2 = √2^2
(x + 3)^2 + (y - 4)^2 = 2

https://www.desmos.com/calculator/g5nkto...
7 answers · 6 days ago
• ### How are imaginary numbers used?

8 answers · 3 days ago