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Sav [38]
3 years ago
12

Matt had 3 piles of coins, A, B and C.

Mathematics
1 answer:
tatiyna3 years ago
4 0

Answer:

48

Step-by-step explanation:

72  into  ratio of 1 : 2 :  6

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System w/Elimination<br>-2x-9y=-25<br><br>-4x-9y=-25
Lerok [7]

x=0 and y=\frac{25}{9}

Step-by-step explanation:

We need to solve the system by elimination and find values of x and y

-2x-9y=-25\,\,\,(1)\\-4x-9y=-25\,\,\,(2)

Subtract eq(1) and eq(2)

-2x-9y=-25\,\,\,(1)\\-4x-9y=-25\,\,\,(2)\\+\,\,\,+\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,+\\---------\\2x=0\\x=0

Now Multiply equation (1) by 2 and subtract with eq(2)

-4x-18y=-50\\-4x-9y=-25\\+\,\,\,\,\,\,+\,\,\,\,\,\,\,\,\,\,\,\,\,\,+\\--------\\-9y=-25\\y=\frac{-25}{-9}\\y=\frac{25}{9}

So, x=0 and y=\frac{25}{9}

Keywords: system by elimination

Learn more about system by elimination at:

  • brainly.com/question/6075514
  • brainly.com/question/2115716
  • brainly.com/question/4192226

#learnwithBrainly

5 0
3 years ago
If you get this, you are a critical thinker.
vazorg [7]

Answer:

The correct answer is 34 people

Step-by-step explanation:

Killing 3 people does not change the number of people in the bedroom, it only means that there are 30 dead people and 4 living people, but overall, here are 34 people in the room.

4 0
3 years ago
Y - 10 = 32.<br><br> Solve for x. Thanks Sooooo MUCH!! :-)
Mademuasel [1]
To solve this we will use inverse operations. 

The inverse operations for subtraction is addition.


y - 10 = 32

32 + 10 = 42

So, y = 42 BUT lets check our work.

42 - 10 = 32. 

So y = 42. 
6 0
3 years ago
Read 2 more answers
Don purchased software for $99.95. How much tax was<br> charged if the tax rate was 9.5%?
joja [24]

Answer:

9.49525

Step-by-step explanation:

You have the total and the percent so you are looking for the part. You can set up a proportion with 9.5 over 100 and x over 99.95. Then you multiply 9.5 times 99.95 to get 949.525 which then you divide by 100. So x is 9.49525

7 0
3 years ago
How to represent 2 3/4 in three different ways
arsen [322]

Answer:

See below in bold.

Step-by-step explanation:

As an improper fraction it is [(2+4) + 3] / 4 = 11/4.

As a decimal fraction it is 2.75.

It can also be written as   2  (3*2)/ (4*2) = 2 6/8.

6 0
4 years ago
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