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Stolb23 [73]
3 years ago
6

Similar triangles what the answer

Mathematics
2 answers:
anzhelika [568]3 years ago
4 0

Answer:

x=8

Step-by-step explanation:


nadezda [96]3 years ago
4 0

Answer:

x = 8

Step-by-step explanation:

Since the triangles are similar then the ratios of corresponding sides are equal, that is

\frac{2x+4}{2x+4+4} = \frac{x+7}{x+7+3}

\frac{2x+4}{2x+8} = \frac{x+7}{x+10} ( cross- multiply )

(2x + 4)(x + 10) = (x + 7)(2x + 8) ← expand factors on both sides

2x² + 24x + 40 = 2x² + 22x + 56 ( subtract 2x² from both sides )

24x + 40 = 22x + 56 ( subtract 22x from both sides )

2x + 40 = 56 ( subtract 40 from both sides )

2x = 16 ( divide both sides by 2)

x = 8



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Use the method of elimination to solve the pair of simultaneous equation 3a=2b+1,3b=5a-3​
BARSIC [14]

Answer:

       a = 3

        b = 4

Step-by-step explanation:

Simultaneous equation

              3a = 2b + 1

         3a - 2b = 1  ------------------(I)

               3b  = 5a - 3

       -5a + 3b = -3 --------------(II)

Multiply equation (I) by 3  & equation (II) by  2 and then add. So, now 'b' will be eliminated and we can find the value of 'a'.

(I)*3       9a - 6b = 3

(II)*2    <u>-10a + 6b = -6</u>  {Now add}

            -a            = -3

                       a = -3/(-1)

        \sf \boxed{a  = 3}

Plugin a = 3 in equation (I)

              3*3 - 2b = 1

                  9 - 2b = 1

                     -2b  = 1 - 9   {Subtracting 9 from both sides}

                      -2b = - 8        

                         b = (-8)/(-2)         {Dividing both sides by (-2_}

          \sf \boxed{b = 4}                      

7 0
2 years ago
Read 2 more answers
Find the distance between E(-3,4) and B(-1,6)​
Marrrta [24]

Answer:

The answer is

<h2>2 \sqrt{2 }  \:  \: or \:  \: 2.828 \:  \:  \: units</h2>

Step-by-step explanation:

The distance between two points can be found by using the formula

<h3>d =  \sqrt{ ({x1 - x2})^{2}  +  ({y1 - y2})^{2} }  \\</h3>

where

(x1 , y1) and (x2 , y2) are the points

From the question the points are

E(-3,4) and B(-1,6)

The distance between them is

<h3>|EB|  =  \sqrt{ ({ - 3 + 1})^{2} +  ({4 - 6})^{2}  }  \\  =  \sqrt{ ({ - 2})^{2}  +  ({ - 2})^{2} }  \\  =  \sqrt{4 + 4}  \ \   \\  = \sqrt{8}</h3>

We have the final answer as

<h3>2 \sqrt{2 }  \:  \: or \:  \: 2.828 \:  \:  \: units</h3>

Hope this helps you

4 0
3 years ago
Triangle PQR is similar to Triangle XYZ. PQ=3 and XY=6. If the perimeter of Triangle XYZ is 20, what is the perimeter of Triangl
Viktor [21]

Answer:

10

Step-by-step explanation:

5 0
3 years ago
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Fill in the missing coordinates
S_A_V [24]
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7 0
3 years ago
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Angelina_Jolie [31]
8600 because 6 is more near to zero than 8.So all the numbers after 6 become 00
3 0
3 years ago
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