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Vector 
vec(AB) has a terminal point 
(7,-9), an 
x component of 13 , and a 
y component of -5 .
Find the coordinates of the initial point, 
A.

A=(◻,◻)

Vector ABundefined \overrightarrow{A B} has a terminal point (7,9) (7,-9) , an x x component of 1313 , and a y y component of 5-5 .\newlineFind the coordinates of the initial point, A A .\newlineA=(,) A=(\square, \square)

Full solution

Q. Vector ABundefined \overrightarrow{A B} has a terminal point (7,9) (7,-9) , an x x component of 1313 , and a y y component of 5-5 .\newlineFind the coordinates of the initial point, A A .\newlineA=(,) A=(\square, \square)
  1. Define vector AB\vec{AB}: The vector AB\vec{AB} is defined by its terminal point B and its components. The xx component of AB\vec{AB} is the difference in the xx-coordinates of point B and point A. We are given that the xx component is 1313, so we can write the equation for the xx-coordinate of point A as Ax=Bx13A_x = B_x - 13.
  2. Calculate x-coordinate of point A: Given the terminal point B has an x-coordinate of 77, we can substitute this into the equation to find AxA_x: Ax=713=6A_x = 7 - 13 = -6.
  3. Calculate y-coordinate of point A: Similarly, the y component of AB\vec{AB} is the difference in the y-coordinates of point B and point A. We are given that the y component is 5-5, so we can write the equation for the y-coordinate of point A as Ay=By(5)A_y = B_y - (-5) or Ay=By+5A_y = B_y + 5.
  4. Combine xx and yy coordinates of point AA: Given the terminal point BB has a yy-coordinate of 9-9, we can substitute this into the equation to find AyA_y: Ay=9+5=4A_y = -9 + 5 = -4.
  5. Combine xx and yy coordinates of point AA: Given the terminal point BB has a yy-coordinate of 9-9, we can substitute this into the equation to find AyA_y: Ay=9+5=4A_y = -9 + 5 = -4. Combining the xx and yy coordinates of point AA, we get yy11.

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