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Marrrta [24]
2 years ago
12

Dilation does not preserve congruence. True or False

Mathematics
1 answer:
Leno4ka [110]2 years ago
5 0

Answer:

True

Step-by-step explanation:

Dilation changes the size of the image so therefore it can't be congruent with the pre-image as congruent means the same.

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Solve the system of equations by elimination.<br> 2x - y + 3z=-1<br> x + 2y - 4z=-1<br> y – 2z=0
MrRa [10]

Answer:

x = -1, y = 2 and z = 1

Step-by-step explanation:

The given system of equations are :

2x - y + 3z= -1  ....(1)

x + 2y - 4z = -1  ......(2)

y – 2z = 0  .....(3)

Equation (3) can be written as :

y = 2z

Use y = 2z in equation (2)

x + 2(2z) - 4z = -1

x + 4z - 4z = -1

x = -1

Put the value of x in equation (1) :

-2 -y +3z = -1

-y+3z = 1 ....(4)

Adding equation (3) and (4)

y-2z+(-y+3z)=1

z = 1

Now put z = 1 in equation (4)

-y+3=1

-y = -2

y = 2

Hence, the values of x,y and z are -1, 2 and 1 respectively.

6 0
3 years ago
What is the surface of a sphere with a radius of 13 units?
ZanzabumX [31]

Sphere = 4PiRsquared

Radius = 13

13 x 13 = 169

169 x 4= 676 Pi

5e surface is 676Pi

7 0
3 years ago
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The teacher said estimate this with out counting 1 by 1 then divide it by 20 HELP PLEASSEE
WARRIOR [948]
Well, first fin dyour best estimate mine is...600
Then after you got your best estimate divide that my 20
600/20 = 30 
Hope this helped :D
7 0
3 years ago
Linda pulls out a tie from a box containing blue, black, and red ties. She records the color and places it back into the box. Th
amid [387]
Which one is the red ties that were drawed? 

25 * 10 = 250
20 * 10 = 200
55 * 10 = 550 

Above: Which ever one is the red one, that's what I think is the answer. Hopefully that helped! :) 
6 0
3 years ago
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Ben and phoebe are finding the slope of a line. Ben chose two points on the line and used them to find the slope. Phoebe used tw
timofeeve [1]
Yes because they went the same way but I may not be right so might want to check it
7 0
2 years ago
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