What are the coordinates of point [tex]P[/tex] on the directed line segment from [tex]R[/tex] to [tex]Q[/tex] such that [tex]P[/tex] is [tex]\frac{5}{6}[/tex] the length of the line segment from [tex]R[/tex] to [tex]Q[/tex]? Round to the nearest tenth if necessary.

[tex]( \square, \ \square )[/tex]



Answer :

Certainly! Let's work through the problem step-by-step.

We are asked to find the coordinates of the point [tex]\( P \)[/tex] that is located [tex]\(\frac{5}{6}\)[/tex] of the distance along the line segment from point [tex]\( R \)[/tex] to point [tex]\( Q \)[/tex].

Given:
- Coordinates of point [tex]\( R \)[/tex] are [tex]\( R(0, 0) \)[/tex].
- Coordinates of point [tex]\( Q \)[/tex] are [tex]\( Q(6, 12) \)[/tex].

To find the coordinates of point [tex]\( P \)[/tex], which lies [tex]\(\frac{5}{6}\)[/tex] of the way from [tex]\( R \)[/tex] to [tex]\( Q \)[/tex], we can use the section formula. The section formula for internal division of a line segment [tex]\( AB \)[/tex] in the ratio [tex]\( m:n \)[/tex] is given by:

[tex]\[ \left( x_P, y_P \right) = \left( \frac{m x_B + n x_A}{m+n}, \frac{m y B + n y_A}{m+n} \right) \][/tex]

In our problem, point [tex]\( P \)[/tex] divides [tex]\( RQ \)[/tex] in the ratio [tex]\( 5:1 \)[/tex] since [tex]\(\frac{5}{6}\)[/tex] implies that for every 5 parts of the total 6 parts of the distance, [tex]\( P \)[/tex] is at the 5th part.

Thus, the formula simplifies:

[tex]\[ \left( x_P, y_P \right) = \left( R_x + \frac{5}{6} (Q_x - R_x), R_y + \frac{5}{6} (Q_y - R_y) \right) \][/tex]

Now plug in the coordinates of [tex]\( R \)[/tex] and [tex]\( Q \)[/tex]:

[tex]\[ x_P = 0 + \frac{5}{6} (6 - 0) \][/tex]
[tex]\[ x_P = 0 + \frac{5}{6} \times 6 \][/tex]
[tex]\[ x_P = 5 \][/tex]

For [tex]\( y_P \)[/tex]:

[tex]\[ y_P = 0 + \frac{5}{6} (12 - 0) \][/tex]
[tex]\[ y_P = 0 + \frac{5}{6} \times 12 \][/tex]
[tex]\[ y_P = 10 \][/tex]

Thus, the coordinates of point [tex]\( P \)[/tex] are:

[tex]\[ (5.0, 10.0) \][/tex]

Rounding to the nearest tenth, the coordinates remain [tex]\( (5.0, 10.0) \)[/tex].

So, the coordinates of point [tex]\( P \)[/tex] are [tex]\( \boxed{(5.0, 10.0)} \)[/tex].