Please help me solve this equation.
1 answer:
Answer:
I solve this equation multiplyed by (-1)
x^2-4x+54=0
with quadratic formula
x1= and x2=
but b^2 -4ac should be positive to exists square root
and 4^2-4*1*54=16-54=-38 is negative
the equation has not solutions integers or rational numbers
so the solutions are (4+iV38)/2 and (4-iV38)/2
Step-by-step explanation:
You might be interested in
Answer:
Step-by-step explanation:
Given that confidence level is 95% and sample mean is within 10 minutes of the population mean. i.e. margin of error = 10
Std deviation of population= 211 minutes
Margin of error = Z critical * std error
Std error = sigma/sq rt n =
Hence we have
\frac{211}{\sqrt{n} }
The minimum sample size is 1710
a) There may not be 1,809 computer users to survey