Electronics: A 115 volt power transformer has 320 turns on the primary. If it delivers a secondary voltage of 12 volts, how many turns are on the secondary? (Hint: Direct proportion)

A. 0.23 turns
B. 3,066.7 turns
C. 33.4 turns
D. 4.3125 turns

150.6

all i did was i multiplied 5.02 by 30

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

im guessing (23,14). hope this : )

y= -2x+4, have a great day