# Efa

Most popular questions and responses by Efa
1. ## Maths

the arithmetic mean of two numbers is 15, and their geometric mean is 9. find the numbers

2. ## Computer Science

When is software described as open source

3. ## Physics

An electric fan is rated 240W,25V.Which fuse value is more suitable for the set

4. ## Maths

1)16(1-1/2^10)/(1-1/2) 2)1/9(3^8-1)/(3-1)

5. ## Maths

1)Find the sum of the first 10terms of 16,8,4,... 2)Find the sum of the first 8terms of 1/9,1/3,1,...

6. ## Maths

Sn=3n-2.Find the 1st,3rd and 5th term

7. ## Maths

By expanding the inequality(the square root of A-the square root of B)^2>0,show that the arithmetic mean of two unequal numbers is greater than their geometric mean.Check by using the numbers a)10 b)2root2 c)2/3

8. ## Maths

The sum of the first and third terms of a G.P.is 7/3 and the sum of the second and fourth term is 7/4.Fin the first and the common difference

1. ## Math

let ties be t, let shirts be s. 4t+7s=746\$ 1s=50\$ 7s=50*7=350 4t+350=746 4t=746-350 4t=396 t=396/4 t=99\$ A tie cost 99\$

posted on August 11, 2016
2. ## math

10percent=30litres 100percent=x x=(100*30)/10=30litres

posted on August 10, 2016
3. ## Math Problem

15

posted on August 3, 2016
4. ## Math

what is the series

posted on July 30, 2016
5. ## Maths

2/5*15 =2*3 =6 Explanation:15 can divide into 5 3times

posted on July 28, 2016
6. ## Maths

The question is incomplete what are you looking for

posted on July 23, 2016
7. ## Math

1 day=24 hours 2 days=48 hours If it loses 5seconds every hour then in 48hours it will lose 48hoursx5seconds=240seconds 60seconds=1minute =240/60 =4minutes In 2days,it loses 4minutes

posted on July 23, 2016