An unknown number x is at most 10. which graph best represents all the values of x?

number line graph with closed circle on 10 and shading to the right.

number line graph with open circle on 10 and shading to the right.

number line graph with open circle on 10 and shading to the left
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number line graph with closed circle on 10 and shading to the left.

The Answer is D Number line graph with closed circle on 10 and shading to the left. I took the test and got it right.

a number is at most 10 so it could be ten so it is a closed circle. it is shading to the left because no more than than ten

whatvare the choices

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