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Cerrena [4.2K]
2 years ago
6

Nandini uses a code to open a security door.

Mathematics
1 answer:
11111nata11111 [884]2 years ago
5 0

Answer:

57

Step-by-step explanation:

getting brainlys

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A store sells a package of 12 trading cards for $5.16. Explain how you can tell that the unit price per card is less than $1. Wh
alexgriva [62]
If the unit price was $1 or more, the price would be $12 or more
5 0
2 years ago
-3x-y=-17 4x + 2 y equals 20
ExtremeBDS [4]
-3x - y = -17
4x + 2y = 20

multiply one part of the equation so that we can be able to use the process of elimination.

(-3x - y = -17)2
4x + 2y = 20

Now we have:

-6x -2y = - 34
4x+2y= 20
------------------------
-2x = -14

Divide -2 on both sides.

-2x = -14
/-2       /-2

x = -7.


=============================================

To solve for y, we just have to substitute the value of x to any of the equation given above, that we feel comfortable with. And I'm going to choose this equation: 4x + 2y = 20


4x + 2y = 20

4(-7) + 2y = 20

-28 + 2y = 20

Add 28 on both sides

-28 + 2y = 20
+28          +28
---------------------
2y = 48
/2      /2

y = 24.


The last thing you would do is to check if the answers is correct.
All you have to do is plug in the values of x and y into both equations and see if they equal to one another.

You may have to do this by yourself :P

Anyways, if you have any questions about this topic, feel free to PM me or any other users interested. Thank you for being part of Brainly! Have a nice day!










4 0
2 years ago
If you want to find how much liquid a container will hold, you want to find the _____.
Sidana [21]

Answer:

volume

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
1015
ludmilkaskok [199]

Answer:

A shirt cost £5 while the hat cost £2.

Step-by-step explanation:

What I did was guess and check until i found the amount of each item. You can also use a table to this.

6 0
3 years ago
Is 3(4x-2) and 12x-2 equivalent?
Korolek [52]

Answer:

Step-by-step explanation:

No

3(4x - 2) = 12x - 4 ≠ 12x -2

3 0
3 years ago
Read 2 more answers
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