(8 points) will mark brainliest!! pls help:)

Mathematics

1 answer:

Marat540 [252]2 years ago

4 0

Answer:

- 7/5 , the decimal form is - 1.4 and the mixed form is -1 2/5

Step-by-step explanation:

You would reduce the expression, if possible, by cancelling the common factors.

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What is the radius of a sphere if its surface area is 2,122.64 square inches? (Use 3.14 for π.) 11 in. 13 in. 121 in. 169 in.

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 $r$ :
$\frac{2122.64}{12.56} =r^2$
$r^2=\frac{2122.64}{12.56}$
$r^2=169$
$r=+or- \sqrt{169}$
$r=13$ 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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2 years ago

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Alex777 [14]

5(x-2) or 5x-10 are both correct

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3 years ago

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Minchanka [31]

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