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Basile [38]
3 years ago
5

Four less than six times a number is the same as eight times the number, x, increased by 12

Mathematics
1 answer:
Crazy boy [7]3 years ago
3 0

Answer:

A

Step-by-step explanation:

let the number be x

4-6x=8x+12

subtract 4 on both sides

-6x=8x+8

subtract 8x on both sides

-14x=8

x=-8/14

x=0.57142857142

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crimeas [40]
To solve this, we are going to use the surface are of a sphere formula: A=4 \pi r^2
where
A is the surface area of the sphere 
r is the radius of the sphere 

We know for our problem that A=2122.64 and \pi =3.14, so lets replace those vales in our formula:
A=4 \pi r^2
2122.64=4(3.14)r^2
2122.64=12.56r^2
Now, we just need to solve our equation for r:
\frac{2122.64}{12.56} =r^2
r^2=\frac{2122.64}{12.56}
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r=+or- \sqrt{169}
r=13 or r=13
Since the radius of a sphere cannot be a negative number, r=13.

We can conclude that the radius of a sphere with surface area <span>2,122.64 </span>in^2 is 13 in.
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