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Elena-2011 [213]
3 years ago
7

X-y = -10 2x+4y=22 substitution

Mathematics
1 answer:
Tema [17]3 years ago
4 0

Answer:

[1]    x - 4y = 22

  [2]    2x + 5y = -21

Step-by-step explanation:

Solve equation [1] for the variable  x  

 

 [1]    x = 4y + 22

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

  [2]    2•(4y+22) + 5y = -21

  [2]    13y = -65

// Solve equation [2] for the variable  y  

  [2]    13y = - 65  

  [2]    y = - 5  

// By now we know this much :

   x = 4y+22

   y = -5

// Use the  y  value to solve for  x  

   x = 4(-5)+22 = 2

I am sorry if I get it wrong.

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Vlad1618 [11]

Answer:

Let x= number of games bowled.

Amount spent at Vista Bowl=2+3.5x

Amount spent at Pinz Bowl=5+3.25x

Setting these two equations equal to each other and solving for x will give you the number of games you can bowl to make the cost the same:

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                             3.5x-3.25x=5-2               combining like terms

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                             x=(3)(4)                         multiply both sides by 4 to isolate the x

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Step-by-step explanation:

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3 years ago
Geometry Pythagorean theorem
lara31 [8.8K]

Answer:

Below!

Step-by-step explanation:

Using Pythagoras theorem, I will solve all of the problems.

<h3>________________________________________________</h3>

<u>Question 9:</u>

  • 10² = 6² + x²
  • => 100 = 36 + x²
  • => 100 - 36 = x²
  • => 64 = x²
  • => x = 8
<h3>________________________________________________</h3>

<u>Question 10:</u>

  • 26² = 24² + x²
  • => 676 = 576 + x²
  • => 676 - 576 = x²
  • => 100 = x²
  • => x = 10
<h3>________________________________________________</h3>

<u>Question 11:</u>

  • 15² = 12² + x²
  • => 225 = 144 + x²
  • => 225 - 144 = x²
  • => 81 = x²
  • => x = 9
<h3>________________________________________________</h3>

<u>Question 12:</u>

  • x² = 8² + 12²
  • => x² = 64 + 144
  • => x² = 208
  • => x = √208
  • => x = 14.2 (Rounded)
<h3>________________________________________________</h3>

<u>Question 13:</u>

  • 7² = 2² + x²
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<h3>________________________________________________</h3>

<u>Question 14</u>

First, let's solve for the variable x using Pythagoras theorem.

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Now, let's solve for the variable y using Pythagoras theorem.

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Answers (Nearest tenth):

  • x = 4 units
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<h3>________________________________________________</h3>

<u>Question 15:</u>

First, let's find the value of the variable y using Pythagoras theorem.

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Now, let's find the value of the variable x using multiplication.

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Answer (Nearest tenth)

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Aleksandr-060686 [28]

Answer:

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Step-by-step explanation:

A line with an undefined slope is a vertical line parallel to the y- axis, with equation

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Step-by-step explanation:

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