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-1

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I am struggling with this question. Any help would be greatly appreciated

matrices vectors

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edited Mar 11 at 18:30

KReiser

9,87121435

asked Mar 11 at 10:12

SamSam

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• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Please do not apply the algebraic-geometry tag to elementary problems involving algebra and geometry, as per the tag description.
  $endgroup$
  – KReiser
  Mar 11 at 18:30
  

  
  
  
  

add a comment | 

-1

$begingroup$

I am struggling with this question. Any help would be greatly appreciated

matrices vectors

share|cite|improve this question

edited Mar 11 at 18:30

KReiser

9,87121435

asked Mar 11 at 10:12

SamSam

305

New contributor

Sam is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Please do not apply the algebraic-geometry tag to elementary problems involving algebra and geometry, as per the tag description.
  $endgroup$
  – KReiser
  Mar 11 at 18:30
  

  
  
  
  

add a comment | 

$begingroup$

I am struggling with this question. Any help would be greatly appreciated

matrices vectors

share|cite|improve this question

edited Mar 11 at 18:30

KReiser

9,87121435

asked Mar 11 at 10:12

SamSam

305

New contributor

Sam is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

$endgroup$

share|cite|improve this question

edited Mar 11 at 18:30

KReiser

9,87121435

asked Mar 11 at 10:12

SamSam

305

New contributor

Sam is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share|cite|improve this question

edited Mar 11 at 18:30

KReiser

9,87121435

asked Mar 11 at 10:12

SamSam

305

New contributor

Sam is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

edited Mar 11 at 18:30

KReiser

9,87121435

edited Mar 11 at 18:30

KReiser

9,87121435

asked Mar 11 at 10:12

SamSam

305

New contributor

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Check out our Code of Conduct.

asked Mar 11 at 10:12

SamSam

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2 Answers
2

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1

$begingroup$

Do you know how a parametric equation works?

Hint

What does the value of (the parameter) $t$ have to be for the first coordinate to be $-8$?

Once you have this value of $t$, what is the value of the second coordinate?

share|cite|improve this answer

answered Mar 11 at 10:16

StackTDStackTD

23.8k2154

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  I believe $t$ has to be -2?
  $endgroup$
  – Sam
  Mar 11 at 10:26
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  Correct, and then you know all the other coordinates as well.
  $endgroup$
  – StackTD
  Mar 11 at 10:27
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Therefore the answer is $19$?
  $endgroup$
  – Sam
  Mar 11 at 10:29
  
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  Yes, that's right :-).
  $endgroup$
  – StackTD
  Mar 11 at 10:30
  
  
  

  
  
  
  

add a comment | 

1

$begingroup$

If $x_1=-8$, then we have $t=-2$.

Can you take it from here ?

share|cite|improve this answer

answered Mar 11 at 10:16

FredFred

48.3k1849

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  so $x2=9+-2*-5=19$?
  $endgroup$
  – Sam
  Mar 11 at 10:29
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Yes, we have $x_2=19.$
  $endgroup$
  – Fred
  Mar 11 at 10:33
  

  
  
  
  

add a comment | 

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1

$begingroup$

Do you know how a parametric equation works?

Hint

What does the value of (the parameter) $t$ have to be for the first coordinate to be $-8$?

Once you have this value of $t$, what is the value of the second coordinate?

share|cite|improve this answer

answered Mar 11 at 10:16

StackTDStackTD

23.8k2154

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  I believe $t$ has to be -2?
  $endgroup$
  – Sam
  Mar 11 at 10:26
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  Correct, and then you know all the other coordinates as well.
  $endgroup$
  – StackTD
  Mar 11 at 10:27
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Therefore the answer is $19$?
  $endgroup$
  – Sam
  Mar 11 at 10:29
  
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  Yes, that's right :-).
  $endgroup$
  – StackTD
  Mar 11 at 10:30
  
  
  

  
  
  
  

add a comment | 

1

$begingroup$

Do you know how a parametric equation works?

Hint

What does the value of (the parameter) $t$ have to be for the first coordinate to be $-8$?

Once you have this value of $t$, what is the value of the second coordinate?

share|cite|improve this answer

answered Mar 11 at 10:16

StackTDStackTD

23.8k2154

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  I believe $t$ has to be -2?
  $endgroup$
  – Sam
  Mar 11 at 10:26
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  Correct, and then you know all the other coordinates as well.
  $endgroup$
  – StackTD
  Mar 11 at 10:27
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Therefore the answer is $19$?
  $endgroup$
  – Sam
  Mar 11 at 10:29
  
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  Yes, that's right :-).
  $endgroup$
  – StackTD
  Mar 11 at 10:30
  
  
  

  
  
  
  

add a comment | 

$begingroup$

Do you know how a parametric equation works?

Hint

What does the value of (the parameter) $t$ have to be for the first coordinate to be $-8$?

Once you have this value of $t$, what is the value of the second coordinate?

share|cite|improve this answer

answered Mar 11 at 10:16

StackTDStackTD

23.8k2154

$endgroup$

share|cite|improve this answer

answered Mar 11 at 10:16

StackTDStackTD

23.8k2154

answered Mar 11 at 10:16

StackTDStackTD

23.8k2154

answered Mar 11 at 10:16

StackTDStackTD

23.8k2154

1

$begingroup$

If $x_1=-8$, then we have $t=-2$.

Can you take it from here ?

share|cite|improve this answer

answered Mar 11 at 10:16

FredFred

48.3k1849

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  so $x2=9+-2*-5=19$?
  $endgroup$
  – Sam
  Mar 11 at 10:29
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Yes, we have $x_2=19.$
  $endgroup$
  – Fred
  Mar 11 at 10:33
  

  
  
  
  

add a comment | 

1

$begingroup$

If $x_1=-8$, then we have $t=-2$.

Can you take it from here ?

share|cite|improve this answer

answered Mar 11 at 10:16

FredFred

48.3k1849

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  so $x2=9+-2*-5=19$?
  $endgroup$
  – Sam
  Mar 11 at 10:29
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Yes, we have $x_2=19.$
  $endgroup$
  – Fred
  Mar 11 at 10:33
  

  
  
  
  

add a comment | 

$begingroup$

If $x_1=-8$, then we have $t=-2$.

Can you take it from here ?

share|cite|improve this answer

answered Mar 11 at 10:16

FredFred

48.3k1849

$endgroup$

share|cite|improve this answer

answered Mar 11 at 10:16

FredFred

48.3k1849

answered Mar 11 at 10:16

FredFred

48.3k1849

answered Mar 11 at 10:16

FredFred

48.3k1849