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

Shirts are on sale for 25% of the original price of $45 what is the sale price

Pleeeeaaaseee help!!

Add or remove commas Jake bent the old rusty hanger back into shape.

Read the following quote from President Lincoln's second inaugural address delivered on March 4, 1865.With malice toward none; with charity for all; with firmne

Okay hi I’m homeschooled but my friend has a super bad home life so she never has time for school so I’m really trying to help her out. The only problem is that

Jack and Nina are graphing two equations on a coordinate grid. Jack has graphed the equation y = 2x. If Nina graphs y = 5x, where will her graph be in relation

A survey of 225 students showed the mean number of hours spent studying per week was 20.6 and the standard deviations was 2.7

Samuel is looking at the floor plan of his house to determine how much carpet he needs to buy for his basement. Based on the floor plan of his basement, how

Please help me out please

2.How is the graph of y=-2x^2-5 different from the graph of y=-2x^2? (1 point) It is shifted 5 units up. It is shifted 5 units down. It is shifted 5 units left.