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 ( 13+ )
Otras preguntas
list the sides of each triangle from shortest to greatest
What is one example of a type of media that might be used in a speech? A A quote from a famous geologist B A fact about the earth's history C A diagram of the c
Please explain to me how to answer no.2 questions
Carbon dioxide and water vapor are variable gases because _____. their amounts vary throughout the atmosphere they only make up 1% of the atmosphere sometimes t
Which one of the following choices is a simple sugar? A. Orange juice B. Chocolate C. Lactase D. Glucose
who's good at physical science b, I need help
Select all of the answers that apply. Climate _____. -is predictable -occurs over a long period -usually only has a local impact -has a global impact -is unpre
The chemical equation shown represents photosynthesis. Carbon dioxide plus A plus light with a right-pointing arrow towards B plus oxygen. The arrow has an x ab
EXTRA POINTS+ BRAINLIEST The following table shows the data collected from four random samples of 50 students from a small middle school regarding the type of t
Under conditions of imperfect competition, the mrp for the twelfth worker is calculated by
