X is equal to 10 so the answer is 10
Answers:
Letter F: none
Number 3: line and plane simmetry
Letter E: line and plane simmetry
Explanation:
1) point symmetry means that a rotation of 180° returns the same original figure.
None of the objects given result the same when you rotate them 180°, so none has point symmetry.
2) line simmetry is when the reflection accross a line returns the same original figure.
Both number 3 and letter E have symmetry accros a horizontal line that crosses them by the middle, which F does not.
3) Plane simmetry: exactly as with the line,number 3 and letter E have simmetry accross a plane that crosses them by the middle.
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The answer to this subtraction is d
So all you need to do if find the min of the function:
f(x)=0.04x^3-4x^2-176x
f'(x)=0.12x^2-8x-176
The only zero for this is x=84.105 <---first
Plug this into f(x) to get f(84.105)=-19300 <---second
