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kolezko [41]
3 years ago
13

X-4y=-4 5x – 4y= 12

Mathematics
2 answers:
vekshin13 years ago
8 0

Answer: {x,y} = {4,2}

  [1]    x - 4y = -4

  [2]    5x - 4y = 12// Solve equation [1] for the variable  x

 [1]    x = 4y - 4

// Plug this in for variable  x  in equation [2]

  [2]    5•(4y-4) - 4y = 12

  [2]    16y = 32

// Solve equation [2] for the variable  y

  [2]    16y = 32

  [2]    y = 2

// By now we know this much :

   x = 4y-4

   y = 2

// Use the  y  value to solve for  x

   x = 4(2)-4 = 4

Step-by-step explanation:

lidiya [134]3 years ago
5 0

Answer: x=4 y=2

Step-by-step explanation:

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The price of a candy bar is $1.53. If this is three cents more than triple the price ten years ago, how much did the candy bar c
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Hello! Using what we know, the price of the candy bar at the moment is $1.53, triple the price from 10 years ago. So, triple cents would technically be $0.03. We divide $1.53 and $0.03 and get 51! But, it would not make sense for the price ten years ago to be 51 then go to 1.53, so we make 51 a decimal, 0.51. We can check to see if this correct, by doing 0.51 times 3, because the price is tripling, and we get $1.53! Have an awesome day! :)

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A quantity with an initial value of 9700 grows continuously at a rate of 0.65% per hour. What is the value of the quantity after
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B

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