Answer: 253.5
9+4=13
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13 to the third power = 169
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20-8= 12
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2+6=8
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169 x 12 = 2028
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2028/8 = 253.5
This is the standard form equation 
What is the ellipse?
The equation for an ellipse is typically written as x² a² + y² b² = 1. x² a² + y² b² = 1. An ellipse with its origin at the center is defined by this equation. The ellipse is stretched further in both the horizontal and vertical directions if a > b, a > b, and if b > a, b > a, respectively.
The standard form of the equation of an ellipse with center (h, k)and major axis parallel to the x-axis is:

where,
a > b
the length of the major axis is 2a
the coordinates of the vertices are (h±a,k)
the length of the minor axis is 2b
the coordinates of the co-vertices are (h,k±b)
the coordinates of the foci are (h±c,k),
where c² = a² − b².
so,

Hence, this is the standard form equation
.
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-1
- 3/5
- 0.5
-0.4
The least is always the one furthest away from 0
Your answer would be 3.4
Anything under 5 it stays the same and anything over 5 it goes up one
7= 16 + 3x
7-16 = 3x
-9 = 3x
x = (-9)/(3)
x = -3