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 ( 62+ )
Otras preguntas
This question is easy, only I am too tired to answer and think straight! Someone please help out, 25 points and brainliest to whoever does it correct <3
I need helpppppppppppp
On December 31, 2015, Coolwear Inc. had balances in Accounts Receivable and Allowance for Uncollectible Accounts of $48,400 and $940, respectively. During 2016,
algebraic expression for the quotient of 17 and k
Can someone please help me!
Meeting at least one person with the flu in thirteen random encounters on campus when the infection rate is 2% (2 in 100 people have the flu)
Jules buys a washing machine. 20% VAT is added to the price of the washing machine. Jules then has to pay a total of £600. What is the price of the washing mach
liz buys 17 identical tickets for £208.25 estimate the cost of one ticket
Please answer this correctly
Methane, the chief component of natural gas, burns in oxygen according to the equationCH4(g) + 2 O2(g) -----> CO2(g) + 2 H2O(g)If 7.0 mol of CH4 react with a
