8² + 5² + 15²

= 64 + 25 + 225

= 64 + ( 25 + 225 )

= 64 + 250

= 314

18.3 + 25.3 + 3.7

= 54 + 75 + 21

= 129 + 21

= 150

Please anyone me

I want  to have a lot of points

Everyone can me?

A = \(\dfrac{1}{1.2}+\dfrac{1}{2.3}+........+\dfrac{1}{34.35}\)

A = 1 - \(\dfrac{1}{2}+\dfrac{1}{2}-\dfrac{1}{3}+..........+\dfrac{1}{34}-\dfrac{1}{35}\)

=> A = 1 - \(\dfrac{1}{35}\)= \(\dfrac{35}{35}-\dfrac{1}{35}=\dfrac{34}{5}\)

So, A = \(\dfrac{34}{5}\)

I don't know this question

But i think Kaya Renger Coordinator is doing correct

Sorry very much

abcabc must to divide : 7 x 11 x 13 = 1001

=> abcabc is : 100100

It's correct

\(\dfrac{x}{2}+x+\dfrac{x}{3}+\dfrac{x}{4}=25\) 

=> x .( \(\dfrac{1}{2}+1+\dfrac{1}{3}+\dfrac{1}{4}\)) = 25

=> x . \(\dfrac{25}{12}\)= 25

=> x = 25 : \(\dfrac{25}{12}\)

     x  = 12

There are 31 days in January

Month 1 is January

I don't know

But Ngân Hà is doing correct

Thank you