Regina tested the average time Gold Brand batteries last. She tested 90 batteries. Identify the population, parameter, sample, and statistic of interest in this situation.
population
[Choose ]
[Choose)
parameter
90 tested Gold Brand batteries
sample
average time the 90 test Gold Brand batteries last
average time all Gold Brand batteries last
statistic of interest
all Gold Brand batteries

the f

last graph i believe

step-by-step explanation:

worked it out i believe

let's call the solutions x₁ = (5 - 2√7)/3 and x₂ = (5 + 2√7)/3

then the equation is (x-x₁)(x-x₂) = 0

if you fill that in you get a lot of numbers which you can recognize as ax²+bx+c=0.

step-by-step explanation:

you can see that a=1 (there is just an x²)

b = (-5 -2√7 + 2√7 - 5)/3 = -10/3

c = -2√7)/3 ) * (-5+2√7)/3) = -1/3

so your answer is 3x^2 – 10x – 1 = 0

no solution exists the way you wrote the equation.