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 ( 21+ )
Otras preguntas
Twelve pounds less than twice janes weight is 270 pounds. What is Janes weight?
637.892 rounded to the nearest whole number
Is the product of 0.4 x 1.8 greater than or less than 0.4 ? Explain your reasoning
Visible blue light has a wavelength of about 0.0000475 centimeters. What is this measurement written in scientific notation? 4.75 × 10^4 centimeters 4.75 × 10^
how do you rename 720 tens
Which groups did not share in the prosperity of the late 1800s? Choose all answers that are correct. a. slum dwellers b. factory owners c. immigrants d. the
what are two numbers between 21.023 and. 21.024
How is the document called the Declaration of Sentiments like the Declaration of Independence? a. Both were designs for a new form of government. b. Both list
four examples of how to test a hypothesis
When France fell to the Nazis in 1940, President Roosevelt issued the first-ever ________ draft. A. wartime B. nationwide C. peacetime D. selective
