PLEASE GIVE A EXPLINATION A plane traveled 400 miles to London and back. The trip there was with the wind. It took 4 hours. The trip back was into the wind. The trip back took 5 hours. Find the speed of the plane
in still air and the speed of the wind.

On the way there the plane must have been goin 80 mph and on the way back if the hours dropped by one the plane must have been going 100 mph

Step-by-step explanation:

this should answer you question

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

tried on you are knowing that we can't leave the picture in the graph ok no problem now you need to send it in the question group