3. Keith applies a new brand of fertilizer to his grass. He
finds that the rate at which the grass grows can be
modeled by a linear function. He observes that the rate of
growth is 1 centimeter every 4 days. After 20 days, he
measures the height of the grass to be 11 centimeters.
What is the initial height of the grass? *

A) 5 centimeters

B) 6 centimeters

C) 7 centimeters

answer: its c because when it has a magnet next to it it will move away from the mixture. hope this

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

486in is correct

step-by-step explanation: