agentkronus
agentkronus
02-03-2015
Mathematics
contestada
Find x when P = 21.
P = x(x - 1) / 2
Respuesta :
konrad509
konrad509
02-03-2015
[tex]21=\dfrac{x(x-1)}{2}\\ 42=x^2-x\\ x^2-x-42=0\\ x^2+6x-7x-42=0\\ x(x+6)-7(x+6)=0\\ (x-7)(x+6)=0\\ x=7 \vee x=-6[/tex]
Answer Link
VER TODAS LAS RESPUESTAS ( 12+ )
Otras preguntas
Describe the stage of product design
Stars are powered by nuclear fusion reactions. please select the best answer from the choices provided t f
Mario is designing a page layout for a sports magazine, and he decides to add the image of a cyclist. Which principle of page layout is Mario using significantl
All of the following are types of personality disorders except __________ personality disorder.
The news always talks about different kinds of social issues such as crime, poverty, corruption, pollution, tragedies, etc. in your own words, retell a recent e
only answer if you know! no spams :)
What’s 2+2 pls pls pls pls pls pls pls pls pls pls pls pls pls pls pls pls pls pls
How many years ago was slavery abolished in the united states.
A malicious actor is preparing a script to run with an excel spreadsheet as soon as the target opens the file. the script includes a few macros designed to secr
In a statistics activity, students are asked to determine the proportion of times that a spinning penny will land with tails up. the students are instructed to
