hot air balloons generally descend at a rate of 200 to 400 feet per minute four balloons descend 200 feet per minute for 9 minutes find the total change in altitude for all 4 balloons

x=half

step-by-step explanation:

there is no graph so i cant sorry

step-by-step explanation:

60 for the first and 130 for the second

step-by-step explanation:

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