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labwork [276]
3 years ago
7

Examine the system of equations. −5x + 5y = 40 4x + 3y = 24 What is the solution?

Mathematics
2 answers:
Solnce55 [7]3 years ago
3 0
-5x + 5y = 40             -20x +20y =160               -5x + 5(8) = 40
4x + 3y = 24               20x +15y =120                -5x + 40 = 40
                                           35y = 280                   -5x =0
                                               y = 8                         x = 0

Hope you understood this
densk [106]3 years ago
3 0
The solution is (0,8). I solved this system of equations by using substitution.
  
1).      -5x + 5y = 40
         + 5x         + 5x
----------------------------------
          5y = 5x + 40
       -------  ----  ------
          5       5      5
 
           y = x + 8

__________________________________________________________

2).  4x + 3(x  + 8) = 24
       4x + 3x + 24 = 24

       7x + 24 = 24
             - 24   -24
    -----------------------
       7x = 0 
      ----   ----
       0      0

        x = 0
__________________________________________________________

3).  -5(0) + 5y = 40
       
        0 + 5y = 40

        5y = 40
       ----   ------
        5       5
  
        y = 8
__________________________________________________________




   



  


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Answer:

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Step-by-step explanation:


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2x^2 + 28x + 98 =
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3 years ago
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Line segment AB is dilated to create line segment A'B' using point Q as the center of dilation.
Rashid [163]

Answer:

2

Step-by-step explanation:

To find the scale of dilation, you have to compare the ratio of the after transform with before transform according to the center of dilation. In this case, the center of dilation is Q so you have to compare QA' : QA. We know that QA= 1.25 and AA' is 1.25. The distance of QA' will be:

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The scale factor will be:

scale factor= QA' : QA.= 2.5 : 1.25

scale factor= 2

7 0
3 years ago
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What is the scale factor in the dilation ?<br><br>1/6<br><br>1/3<br><br>3<br><br>6​
anzhelika [568]

Answer:

3

Step-by-step explanation:

<u>1) Find two corresponding lengths between the image and the pre-image</u>

Pre-image (bottom side) = 3 units

Image (bottom side) = 9 units

We can use any corresponding lengths for this step.

<u>2) Divide the length of the side from the image by the length of the side from the pre-image</u>

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= 3

Therefore, the scale factor of the dilation is 3.

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5 0
3 years ago
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The angles of a pentagon are x, x − 5 0 , x + 100 , 2x + 150and 2x + 300 . Find all the angles.
miv72 [106K]

Answer:

The interior angles are 70°,65°,80°,155° and 170°

Step-by-step explanation:

step 1

Find the sum of the interior angles of the pentagon

The sum is equal to

S=(n-2)*180°

where

n is the number of sides of polygon

n=5 (pentagon)

substitute

S=(5-2)*180°=540°

step 2

Find the value of x

Sum the given angles and equate to 540

x+(x-5)+(x+10)+(2x+15)+(2x+30)=540°

7x+50=540°

7x=490°

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step 3

Find all the angles

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(2x+30)=(2*70+30)=170°

8 0
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