How to solve this? [substitution method]


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Answers

• Réponse publiée par: princessgarcia23

  1. x = 0, y = 4

  2. x = -3, y = -5

  Step-by-step explanation:

  1. Substitute x by 4 - y

  Now you have 2y + 4 = 12

  Solve for y and you have y = 4

  Substitute y and you have x = 0.

  2. Substitute y by x - 2

  Then you get 2x - 3(x-2) = 9 [Note: Distribute the negative sign]

  After distributing you get -x + 6 = 9

  Solve for x and you get x = -3 (Multiply -1 on both sides)

  Substitute x now and y = -5

  Hope this helps.
• Réponse publiée par: elaineeee

  Margin fo error=z(sub a/2) * √(p*(1-p))/n
  
  0.08=0.6736*√(0.25*(1-0.25))/n
  n=(0.25*(1-0.25))/(0.08/0.6736)^2
  n=13.2931
  
  hope it helps you
• Réponse publiée par: kateclaire

  All you have to do is use the triangle inequality theorem, which states that the sum of two side lengths of a triangle is always greater than the third side. if this is true for all three combinations of added side lengths, then you will have a triangle.