Indy 500 Qualifier Speeds The speeds in miles per hour of seven randomly selected qualifiers for the Indianapolis 500 (in 2012) are listed below. Estimate the mean qualifying speed with 95% confidence. Round your answers to at least four decimal places. 223.684 222.929 226.240 224.037 226.484 225.172 223.422

the correct answers i think are b. and d.

give me brainliest if it is correct!

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

hmu if ur willing to do a algebra a online class i’ll pay 600 hmu on the gram profitpreme