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valentinak56 [21]
3 years ago
12

What is the x coordinate of the solution of the system? 2x+y=15 and x-y=3

Mathematics
1 answer:
Varvara68 [4.7K]3 years ago
6 0

x - y = 3

x = 3 + y

x -3 = y

y = x-3

put it in 1st equation

2x +y = 15

2x + x - 3 = 15

3x - 3 = 15

3x = 15+3 = 18

x = 18/3 = 6

x = 6

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Answer:

The price of one reusable bottle is $8.12

Step-by-steetp explanation:

Ms stone wanted to purchase two reusable bottles but discovered she had only ⅝of the Mone and that ⅝ is equal to $ 10.15.

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What is the missing length?
TEA [102]
Answer:  13.722 km ;  or, write as:  13  13/18 km .
___________________________________________________
Explanation:
___________________________________________________
Area = Length * width ; 
___________________________________________________
or, write as:  A = L * w ;
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Given: A = 247 km² ; 
           
          L = 18 km ; 
 
          w = "y" ; 
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 Find:  "y"
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  A = L * w ; 
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Plug in our values:
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  247 km² = 18 km * "y" ;  solve for "y" (in units of "km") ;

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        18 y = 247 ; 
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Divide each side of the equation by "18"; to isolate "y" on one side of the equation; and to solve for "y" :
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        18 y / 18 = 247 / 18 ;
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  to get:
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              y = 13.7222222222222222...... km ;  round to: 13.722 km

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