Atool rental store charges a flat fee of $9.50 to rent a chain saw, and $3.75 for each day, including the first. write an equation that expresses the cost y of renting this saw if it's rented for x days. a. y = 3.75x + 9.50 b. y = 9.50x + 3.75 c. y = 3.75x – 9.50 d. y = 3.75(x + 9.50)

7

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