If the radius is 13 cm what is the diameter? If the diameter is 4 ft what is the radius?
If the radius is 10 mm what is the diameter?
If the diameter is 16 in what is the radius?
If the radius is 7 mi what is the diameter?
If the diameter is 22 yd what is the radius?

squares, rhombus, rectangles

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

60: 45 =12: 9 =4: 3 so the answer is 4: 3