Help plzz. Above are two different models of the same triangular-shaped garden. If the height of the model on the left is 14 cm, what is the height of the model on the right?

A.

19 cm

B.

21.5 cm

C.

16 cm

D.

28 cm

b

step-by-step explanation:

the word superfluous means unnecessary

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

25.3

step-by-step explanation:

1st step

add 3+6

=9

multipy 9*3

=37