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 ( 78+ )
Otras preguntas
A baseball pitcher throws a fastball with a 100 ns impulse. if he applied the force in 0. 15 seconds, what force did he apply?
Maya lin said that the memorial was meant to help people confront their pain. what kinds of changes occur when emotional wounds begin to heal? how does the memo
__________ always pairs with _________. a. adenine, guanine b. thymine, guanine c. guanine, cytosine d. cytosine, thymine
Compare MAN, WAN, and LAN, and make a table having three columns.
Paula finished the race at 2:14 p.m Beatrice finished the race 22 minutes earlier what time did Beatrice finish the race a 1:54 p.m b 1:48 p.m. c 1:58 p.m. d 1:
The 1970s economy in the united states experienced a phenomenon known as ""stagflation. "" what are three indicators of stagflation?
How much is a one time investment of 250 be when invested at 6% for 40 years in compound annually
If you start with 3 moles of sodium and 3 moles of chlorine to produce sodium chloride, what is the limiting reagent?(you will need to balance the equation firs
So if the answer is $5,505,210. 50, you would input 5,505,210. what is forecast revenue in 2017?
If a solution has a pH of 2, what is the hydroxide ion concentration? Group of answer choices A. 1x10-12 M B. 12 C. 1x10-2 M D. 2
