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Stels [109]
3 years ago
15

Anybody get this??? please help.

Mathematics
1 answer:
lbvjy [14]3 years ago
6 0

Hey there! "

Firstly we have to combine your like terms

Like: 2x  \\ and \\ 5x  \\ \\ \\ 0  \\ and \\ 0

Out of all of those terms we get

2x= 5x

Out of those terms we just did, ( 2x \\ and \\ 5x ) , we have to move on to your next step which is to subtract by5x on each of your sides

Like: 2x- 5x \\ \\ = 5x -5x

Cancel:5x - 5x because it give you the result of 0

Keep: 2x - 5x because it is helping you solve for your actual answer!

2x - 5x = -3 \\ \\ -3 =  0

Now we have to divide by -3 on each of your sides

Like: \frac{-3x}{3}  = \frac{0}{-3}

Cancel: \frac{-3x}{-3} because it gives you the result of a 1

Keep: \frac{0}{3 } because it gives you your result

Answer; x = 0 , y = 0

Good luck on your assignment and enjoy your day!

~LoveYourselfFirst:)

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Answer:

x = 387

Step-by-step explanation:

The wind acts in the opposite direction to the plane when the time is longer.

The wind acts in the same direction as the plane when the time is shorter.

Equation

d = r*t

Givens

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  • y = wind speed
  • t1 = 5 hours
  • t2 = 4 hours.

Substitution

  • d = (x + y) * t
  • 1720 = (x + y) * 4
  • 1720 = (x - y) * 5

Since the two distances are the same, you can equate the right hand sides.

  • (x + y) * 4 = (x - y)*5              Remove the brackets.
  • 4x + 4y = 5x - 5y                  Add 5y to both sides
  • 4x + 4y + 5y = 5x - 5y + 5y  Combine all the terms.
  • 4x + 9y = 5x                          Subtract 4x from both sides
  • 9y + 4x - 4x = 5x - 4x           Combine
  • 9y = x

Now use one of the given equations with the distance

  • 1720 = (x + y)*4           Substitute 9y for x
  • 1720 = (9y + y) *  4      Combine
  • 1720 = 10y * 4             Multiply the right
  • 1720 = 40y                  Divide by 40
  • 1720/40 = 40y/40      Do the division
  • 43 = y                          y = wind speek
  • 9y = x                          x = 9*y  
  • 9*43 = x
  • x = 387 miles per hour.
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