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 ( 43+ )
Otras preguntas
Which is the best SIMPLEST level of organization in a human being ?
Reformists want to change things through _____. peaceful means violent means any means necessary the cheapest means
Based on the results of the feeding experiment, what conclusions can you draw? select all that apply. (for help interpreting the results, see the hints.) roache
The table below shows a baseball player’s batting average batting left and right versus left- and right-handed pitches Left-handed pitchers Right-handed pitche
What does this sequence provide coding for ATGAAAGCCTATGCACCA A) carbohydrates B) proteins C) ATP D) lipids
Explain why the adrenal and thyroid glands atrophy if the pituitary gland ceases to function
Please Help!!! Which phrase completes the diagram? A.) Discrimination faced by immigrants B.) Criticisms made about trustbusters C.) Problems fixes by civil
Selected t-accounts of moore company are given below for the just completed year: raw materials bal. 1/1 15,000 credits ? debits 120,000 bal. 12/31 25,000 manuf
Which best describes the author’s purpose in these frames of Iqbal? to show how Iqbal stood up to Arshad to show how Iqbal inspired others to show how Iqbal pe
What is a risk/benefit assessment? Why is it important?
