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 ( 35+ )
Otras preguntas
what is 7/10 minus 1/2
The number on Mr. Mott's door is after 100. If you count by 20s four times, you will get the number. What number is it?
Tamara is reviewing recent orders at her deli to determine which meats she should order. She found that of 1,000 orders, 450 customers ordered turkey, 375 custo
What is the volume of a circular mine passage that is 19.0 feet in diameter and 210.0 feet long?
Laura cuts 64 inches of ribbon into two parts and give her mom one part. Laura's part is 28 inches long. Her mom cuts her ribbon into 6 equal pieces. How long i
what is 7/10 minus 1/2
Why was the Berlin wall built?
Jana bought a car for $4200 and later sold it for a 30% profit. How much did Jana sell the car for?
which geographic factor was most significant in helping the soviet union withstand German attacks in world war II
What number should be added to the expression x^2 + 14x to change it into a perfect square trinomial? Can you help me with this?
