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 ( 89+ )
Otras preguntas
Sasha lives 1,493 miles from her grandmother. One year, Sasha's family made 4 round trips to visit her grandmother. How many miles did they travel in all?
Solve the inequality and express your answer in interval notation. x^2+8x+3<0
To dissect a persuasive writing prompt, the writer: Question 5 options: A. reads it and then ignores it. B. writes about the think statements. C. reads it and d
What are discretionary expenses ?
What caused virtually all of Canada and some of the northern US to be once covered by thick glacial ice almost 15,000 years ago? Question 4 options: Changes in
Statistics show that one in five people in the world are severely _____. A. over educated B. undernourished C. underestimated D. over fed
A bush baby, an african primate, is capable of leaping vertical to the remarkable height of 2.3 m. to jump this high, the bush baby accelerates over a distance
The bill of rights promises that punishment for a crime cannot be cruel or unusual, meaning that it cannot be painful or degrading to the person's dignity. what
Who is considered the father of the hebrews
how does first ionization energy increase or decrease from left to right on the periodic table?
