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brilliants [131]
2 years ago
13

Solve the system of equations 2x + y = -1.5 y = 3.50 + 15

Mathematics
1 answer:
lukranit [14]2 years ago
6 0
So first y = 3.50 + 15 = 18.5
Next 2x + y = -1.5
2x = -1.5 -y
2x = -1.5 - 18.5 = -20
x = -20/2 = -10
So
x = -10
y = 18.5
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Three merchants find a purse lying in the road. The first asserts that the discovery would make him twice as wealthy as the othe
Angelina_Jolie [31]

Answer: the system of equation would be :

  • A + Y = 2 (B+C)  
  • B + Y = 3B
  • C + Y = 5C

the three merchants would have 10 dollars, 10 dollars, and 5 dollars respectively

Step-by-step explanation:

before finding the purse, lets assume the wealth of the 3 merchants were as follows:

first merchant = A  dollars

second merchant = B dollars

third merchant = C dollars

  1. lets assume the purse contained Y dollars

After finding the purse they all claimed they would have the following:

first merchant said adding the money in the purse to his wealth would make him twice as rich as the other two combined : A + Y = 2 (B+C)  

second merchant said adding the money in the purse to his wealth would make his wealth triple  : B + Y = 3B

third merchant said adding the money in the purse to his wealth would make his wealth increase five folds : C + Y = 5C

third merchant = C dollars

therefore the system of equations to represent the problems are:

  • A + Y = 2 (B+C)  
  • B + Y = 3B
  • C + Y = 5C

2. now when the money in the purse is 20 dollars (Y= 20 dollars ), from the equations above

the second merchant will have :

B + Y = 3B  

 B + 20 = 3B

  3B - B = 20

  2B = 20

   B = 10 dollars

the third merchant will have :

C + Y = 5C

C + 20 = 5C

5C - C = 20

4C = 20

C = 5 dollars

the first merchant will have :

A + Y = 2 (B+C)  

A + 20 = 2 ( 10 + 5)

A = 2 (15) - 20

A = 30 - 20

A = 10 dollars

8 0
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Answer:

all u have to do is...

Step-by-step explanation:

add 7.10 and 6.79 together to get your answer hope this helped!!

IF IT DID PLZ GIVE ME BRAINIEST!!

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Answer:

4. 8 5/12

Step-by-step explanation:

4 2/3 + 3 3/4 =

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