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grandymaker [24]
4 years ago
15

I need help. how do i write 4=(-8)+3x as a decimal

Mathematics
2 answers:
miskamm [114]4 years ago
7 0
4=(-8)+3x
+8 +8
12=3x
4=x

or 4.0
Vanyuwa [196]4 years ago
5 0
This is an equation, you can't write equations as decimals. I think you're asking for x (as a decimal)?

Add 8 to each side: 4+8= 8+(-8)+3x
12=3x
x=4
This is a whole number so it's already in decimal form
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Let h = height of the box,
x = side length of the base.

Volume of the box is  V=x^{2} h = 115. 
So h = \frac{115}{ x^{2} }

Surface area of a box is S = 2(Width • Length + Length • Height + Height • Width).
So surface area of the box is
S = 2( x^{2}  + hx + hx)  \\ = 2 x^{2}  + 4hx  \\  = 2 x^{2}  + 4( \frac{115}{ x^{2} } )x
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The surface are is supposed to be the minimum. So we'll need to find the first derivative of the surface area function and set it to zero.

S' = 4x- \frac{460}{ x^{2} }  = 0
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5 0
3 years ago
Read 2 more answers
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