What expression can be used to determine the total cost of buying c pounds of cashews for $3.85 per pound and f pounds of flour for $0.84 per pound?
Choose the correct expression for determining the total cost.
O A. 0.84c +3.85f
OB. 3.850 +0.84f
OC. 3.850 - 0.84f
OD. 4.69(C+f)

whatare you sayig

step-by-step explanation:

the opening of this porabola is facing up

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