f(20)=-0.016x^2+1.44x+5.4

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Solution for f(20)=-0.016x^2+1.44x+5.4 equation: 


Simplifying
f(20) = -0.016x2 + 1.44x + 5.4

Reorder the terms for easier multiplication:
20f = -0.016x2 + 1.44x + 5.4

Reorder the terms:
20f = 5.4 + 1.44x + -0.016x2

Solving
20f = 5.4 + 1.44x + -0.016x2

Solving for variable 'f'.

Move all terms containing f to the left, all other terms to the right.

Divide each side by '20'.
f = 0.27 + 0.072x + -0.0008x2

Simplifying
f = 0.27 + 0.072x + -0.0008x2

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