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

What is one way in which dramatic irony is used in a piece of literature? a. By having a character say one thing when he or she actually means the opposite b. B

A __________ is an organization of political-party workers, with the main goal of electing party members to public office. a. political boss b. political machin

What is the best way to change this sentence from passive voice to active voice? a. By the Moon's orbit around the Earth, the tidal effects of the ocean are cre

Calvin and Melvin are two of Santa's elves. The number of toys they build is given by 11c+8m where c is the number of candy canes Calvin eats for breakfast and

To what does Romeo compare his lips when he talks to Juliet a. Saints b. Pilgrims c. Shrines d. Stars

Wright’s mother mainly worries that the publication of his story will harm his __________. a. character b. reputation c. development as a writer d. relationship

A rocket is launched at 85 feet per second from a launch pad that is 28 feet above the ground. Which equation can be used to determine the height of the rocket

When an adverb modifies a verb with a helping verb, the adverb should generally be placed a. at the end of the sentence. b. after the helping verb. c. before th

One of the few civil rights measures that Congress passed during John Kennedy’s presidency was the 24th Amendment to the Constitution, which banned __________.

Quick Fix Inc. repairs bikes. The company’s revenue equals R(h) = 400 + 220h dollars for every h hours spent repairing bikes. The company’s overhead cost equals