Great method, EP!
It is always changing. As of 12/27/18, 8:44AM Eastern Time, one USD is 0.05 peso.
Therefore, 38 USD is 756.17 Peso.
You are very welcome!
:P
Rom, I'm not sure what that bold pi looking thing is. Could you explain that?
Substitute \(2x+3=y\) into the first equation!
\(x+19=2x+3-3, x+19=2x, x=19\)
Then 2(19)+3=41, so \((x, y)=(19, 41)\)
This is old, but...
(Derived from AoPS' Alcumus, thank you!)
That's just \(n\) !
Imagine you have 10 cakes in front of you and you choose one. How many possibilities are there? 10 possibilities, of course! (Unless you are like me and you love cake so you sneak another one ) This is for any number, not just 10, of course.
576, as for odd factors we need a square number.
I just tried doing it out.
This means the area of ABCD is 42.
Wow, smart! I never knew you could do it that way... helpful!
Oh yes, you are right! Nice proof there!
(Derived from AoPS' Alcumus, thank you!)
) This is for any number, not just 10, of course.