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

Otras preguntas

The mating of California condors in zoos is an example of _____. captive breeding habitat removal mandated preservation habitat preservation @Cas_fangirl_14

a line passes through (9, –9) and (10, –5).write an equation for the line in point-slope form. rewrite the equation in standard form using integers. y 9 = (x –

During the middle ages which civilization made the fewest recognized scientific discoveries compared to others

Hats come in many shapes and sizes. There are top hats and cowboy hats, bonnets and berets. There are bowler hats, fedoras, flat caps, baseball caps, and helmet

It takes Franklin 14 hours to make a 200-square-foot cement patio. It takes Scott 10 hours to make the same size patio. Which equation can be used to find x, th

8x-6y=12 on the graph

According to newton��s first law of motion, if you roll a ball in a straight line in an open field, what will happen to the ball? a. the ball will continue on

Rounding me to the nearest ten, hundred, thousand, or ten thousand will give you the same number. Four of my digits are the same. The sum of all five of the dig

when talking or writing about a play, should you refer to a specific part of the play only by the scene number and not the act number?

Dennis is going to be talking to his boss about wanting a raise. the purpose of his communication is to ______. a. inform his boss b. persuade his boss c. an