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luda_lava [24]
4 years ago
8

**YOU WILL GET A THANKS, 11 POINTS, INCLUDING A HAPPY STUDENT**

Mathematics
2 answers:
Semmy [17]4 years ago
8 0

320 was the difference in Cheyenne's score

Darina [25.2K]4 years ago
7 0

The difference is 320

I got this by subtracting 420 and 100

420 - 100 = 320

Hope this helps

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A turtle's shell is 29 centimeters long. What is the length of the shell in millimeters?
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5 0
4 years ago
3x-4y=<br> 3x−4y=<br> \,\,9<br> 9<br> -5x+4y=<br> −5x+4y=<br> \,\,-23<br> −23
Marta_Voda [28]

Answer: (7,3)

Step-by-step explanation:

<u>[Please check]:</u>   I decoded the equations as follows:

3x-4y=9 and −5x+4y=-23

We can solve this by either of two methods:  Algebra and graphing.

<u>Algebra:</u>

Add the two equations:

  3x-4y=9

<u> −5x+4y=-23</u>

-2x = -14

   x = 7

Use x=7 to solve for y:

3x-4y=9

3(7)-4y=9

21 -4y = 9

-4y = -12

y = 3

----

The solution is (7,3)

======

<u>Graphing:</u>

See the attached graph.  The lines intersect at (7,3)

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3 years ago
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svlad2 [7]

Answer:

B. (8,4)

Step-by-step explanation:

To find the solution of the system, look at where the lines intersect. The intersecting point is (8,4). The solution to the system of equations is (8,4).

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