Sin(4π/3)= -√3/2
cos(5π/6)= -√3/2
600:450 divided by 10 = 60:45
60:45 divided by 15 = 4:3
so 4:3 x 15 = 60:45 x 10 = 600:450
B is the answer i’m pretty sure
The minimum y-value of the function for the parabolic equation is -13.
<h3>What is the vertex of a parabolic equation in quadratic form?</h3>
The vertex for an up-down facing parabola of the form y = ax² + bx + c is 
From the given equation:
y = x² + 8x + 3
The parameters for the parabola are:
a = 1, b = 8, c = 3


If we replace the value of
to find the minimum value of
value, we have:

Thus, the parabola vertex is (-4,-13). If a< 0, the vertex is a maximum value and If a>0, the vertex is a minimum value.
Learn more about the vertex of a parabolic equation here:
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Answer:
Step-by-step explanation:
The solutions are x=\frac{1+\sqrt{7}}{2} and x=\frac{1-\sqrt{7}}{2}