mayvar
mayvar
05-09-2014
Mathematics
contestada
use elimination to solve: NN+ND=50
5NN+10ND=450
Respuesta :
mariamikayla
mariamikayla
05-09-2014
[tex]5NN+10ND=450\\5(NN+2ND)=450 \\ NN+2ND=90 \\ \\ \boxed{NN=90-2ND} \\ \\ NN+ND=50 =>\boxed{NN=50-ND} \\ \\ \\ 90-2ND=50-ND \\ -2ND+ND=50-90 \\ -ND=-40 \\ \\ \boxed{ND=40} \\ \\ NN=50-ND \\ NN=50-40 \\ \\ \boxed{NN=10}[/tex]
Answer Link
VER TODAS LAS RESPUESTAS ( 81+ )
Otras preguntas
A body of mass 2 kg is moving in the positive X-Direction with a speed of 4 m/s collides head on with an another body of mass 3 kg moving in the negative X-Dire
name two oil yielding crops
Divide.(10a^4-5a^3) / 5a
what does 'heaven knows' mean?
What Is Mind Control Fiction?
What Is Paranormal Fiction?
What Does 'Buy the Farm' Mean?
explain why it is usually only necessary to test one point when graphing an inequality
why was sputnik important?
What Does 'Behind Bars' Mean?
