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 ( 27+ )
Otras preguntas
Which issue was addressed by the Supreme Court in the Dred Scott case? A. whether Northerners could own slaves B. whether slaves were citizens or property C. wh
how quickly would groundwater flow through rock with high porosity and high permeability?pls explain
please l need help with this system of equation. Solve the system by the method of substitution. 3/2× +3/4y =16 3/4×-y =4 (×,y)=?
Which can be represented by the expression 17 – 2x?
Which sentence uses possessive personal pronouns correctly? A. Ewan wondered if the keys were his'. B. Their's are the two on the side, by the counter. C. Have
Jamie bought 5/8 pound of wheat flour. He also bought 2/8 pound of white flour. How much flour did he buy?
Which sentence contains an error in the use of end marks or commas? A. During the holidays, my mom helped me put together a package of goodies for Tammy. B. Sin
The angle of incidence (i) is _____ to the angle of the reflection (r). This is known as the Law of ______. Can someone please help me fill in the gaps?
In "My Father Is a Simple Man," what do the lines "and when the bitter-hard reality / comes at me like a punishing / evil stranger" contain? A. a rhyming couple
What is the correct way to rewrite this sentence? Tom opened the box and looked into it only to find it empty. Tom opened the box and looked into it; only to fi
