Ruth’s credit card has an APR of 10.91%, and it computes finance charges using the previous balance method on a 30-day billing cycle. During the April billing cycle, she made a $45.17 payment on April 10th and a $88.34 purchase on April 17th. Her total at the start of May was $847.64. What was her balance at the beginning of April? a. $890.91 b. $797.22 c. $796.87 d. $804.47

50.6

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

on plase n