PLEASE HELP!! WILL GIVE BRAINLIEST IF UR RIGHT!!

1 answer:

3 0

ratio of the surface area of the sphere to the surface area of the cube
=
4nr^2 / 24r^2 = n/6

answer

A.
n/6

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1.
$8x+5y=6 \ \ \ |\times 2 \\
3x-2y=10 \ \ \ |\times 5 \\ \\
16x+10y=12 \\
\underline{15x-10y=50} \\
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2.
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\underline{15x+18y=240 \ \ } \\
40y+18y=50+240 \\
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5x+6y=80 \\
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3.
$4x+12y=-24 \\
3x-6y=-18 \ \ \ |\times 2 \\ \\
4x+12y=-24 \\
\underline{6x-12y=-36} \\
4x+6x=-24-36 \\
10x=-60 \ \ \ |\div 10 \\
x=-6 \\ \\
3x-6y=-18 \\
3 \times (-6)-6y=-18 \\
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y=0 \\ \\
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4.
$5x-6y=48 \ \ \ |\times 2 \\
2x+5y=-3 \ \ \ |\times (-5) \\ \\
10x-12y=96 \\
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