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nadezda [96]
3 years ago
10

The coordinates of △ABC are A(12,8), B(10,18), C(4,16) . After a dilation, the coordinates are A'(6,4), B'(5,9), C'(2,8) A′(6,4)

, B′(5,9), C′(2,8) . Find the scale factor.
Mathematics
2 answers:
gogolik [260]3 years ago
7 0
Take note of that every single coordinate had their values divided by 2 after the dilation. Therefore, the scaling factor is 1/2, or .5
mario62 [17]3 years ago
7 0
Hello!

Let's look at A and A'. This is (12,8) and (6,4). As you can see, each value in A' is 1/2 of that in A. In all the other points, their dilated point is 1/2 the original.

Therefore, our scale factor is 1/2.

I hope this helps!
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Answer:

V = 34,13*π   cubic units

Step-by-step explanation: See Annex

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(x/2)² = 2*x

x²/4 = 2*x

x  =  2*4         x  = 8      and   y = 8/2       y = 4

Then point  P ( 8 ;  4 )

The other point Q is  Q ( 0; 0)

From these  two points, we get the integration limits for dy ( 0 , 4 )are the integration limits.

Now with the help of geogebra we have: In the annex segment ABCD is dy then

V = π *∫₀⁴ (R² - r² ) *dy   =  π *∫₀⁴ (2*y)² - (y²/2)² dy =  π * ∫₀⁴ [(4y²) - y⁴/4 ] dy

V = π * [(4/3)y³ - (1/20)y⁵] |₀⁴

V =  π * [ (4/3)*4³ - 0 - 1/20)*1024 + 0 )

V = π * [256/3  - 51,20]

V = 34,13*π   cubic units

3 0
2 years ago
Write the equation of the circle with center (5, 1) and radius r = 10
kherson [118]
The standard equation for the circle is:

(x-h)^2+(y-k)^2=r^2, where (h,k) is the center of the circle and r is the radius.

We are given that the center is (5,1) and r=10 so

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4 0
2 years ago
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gavmur [86]

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1.96996999...

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8 0
3 years ago
Question 25
AysviL [449]

Answer:

120

Step-by-step explanation:

First, you have to calculate the money that Seth would spent if he goes to 30 movies if his father gets the summer movie pass by adding up the cost of the pass plus the result of multiplying the cost per movie with the pass for the number of movies:

30+(3*30)=30+90=120

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Third, you need to find the difference between both costs:

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According to this, the answer is that if Seth plans to go to 30 movies this summer, he would save 120.

8 0
2 years ago
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Slav-nsk [51]

Answer:

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Step-by-step explanation:

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8 0
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