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2 years ago

PLEASE HELP!!!

Mathematics

2 answers:

Llana [10]2 years ago

7 0

Answer:

i think its 1cm/10mm = 12.5/x

and the answer like the thing is 125 mm = 12.5

im from korea so i know mm/cm

NemiM [27]2 years ago

6 0

C (the third one) good luck on it!

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How does the volume of a sphere compare to that of the volume of a cylinder? What would you say the scale factor for Vol sphere:

borishaifa [10]

Answer:

The volume of a sphere is 2/3 times the volume of a similar cylinder

Scale factor : 2/3

Step-by-step explanation:

Let us consider a sphere of radius r. The volume of the sphere will be given as

$V_{s}=\frac{4}{3} \pi r^{3}$

Similarly, let us consider a cylinder with its height being twice the radius of the sphere. We will have its volume given as:

$V_{c}=\pi r^{2}h$

but h = 2r

Hence we have

$V_{c}= 2\pi r^{3}h$

We can divide the two volumes to get a constant that links them together

$\frac{V_{s}}{V_{c}}=\frac{\frac{4}{3} \pi r^{3}}{2\pi r^{3}h}$

this will give us 2/3

Hence the scale factor for Vol sphere: Vol cylinder is 2/3

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3 years ago

Help solve <br> 9 = -7 -2y<br> And show the steps

Snowcat [4.5K]

9 = -7-2y
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2 years ago

What is the solutions of the equation 2 (x+2) ^2-4=28

JulsSmile [24]

Answer:

x = 2 x = -6

Step-by-step explanation:

2 (x+2) ^2-4=28

Add 4 to each side

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Divide by 2

2/2 (x+2) ^2=32/2

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Take the square root of each side

sqrt((x+2)^2) =±sqrt( 16)

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Subtract 2 from each side

x+2-2 = -2±4

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3 years ago

What are the correct answers?

Delvig [45]

1. y= -x - 15
2. y= -4x + 1/2
3. y= 2x + 1
4. y= 2/3x + 3
5. y= -1/2x - 4
6. y= -3x + 13

Glad I could help

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2 years ago