Tom wants to order tickets online so that he and three of his friends can go together to waterpark the cost of the tickets is . $16 per person there is also a $2 .50 time service free for ordering tickets online write an used for expression to find the total cost of ordering 4 tickets online

($16*4) + $2.50 = n  

n = $66.50

$66.50 is your answer

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

is this the complete