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
A four sided sandbox has exactly two right angles side lengths 5ft and two side lengths 6ft what shape best describes the shape of the sandbox
there was a young man from saint joe who excelled with his arrow and bow. he’d take aim at the sun, and before he was done, the sun would lose half of its glow.
the number p is 20 more than the number q using algerbra, writee the relationship between p and q
WILL GOLD MEDAL1) Given the data 12, 39, 21, 18, 24, 17, 12, 25: What is the outlier in the data? What is the mean with the outlier? What is the mean w
Throughout the course of the school day, 4-year-old joshua's teacher encourages him to move freely from playing with play dough, to counting colored sticks, to
Do some research about World War II to broaden your understanding of the events influencing Corrie's life. Use encyclopedias, history books, videos, and maps. T
Mai runs around a 400 meter track at a constant speed of 250 meters per minute. How many minutes does it take Mai to complete 4 laps on the track? Explain or sh
What action did President Washington take to help build a strong U.S. economy? A. He supported farmers over merchants. B. He borrowed money from foreign count
Having an extra finger is a dominant condition. a woman is homozygous dominant for an extra finger and her husband is homozygous recessive. what phenotypes do
To be eligible for initial licensure an applicant cannot have been on court-ordered supervision or probation for any class b criminal offense within the last __
