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JoeAnthony3293
05.04.2021 •
Mathematics
P is the point (16,9) and Q is the point (22. 24).
(a) Find the equation of the line perpendicular to PQ that passes through the point (5, 1).
Give your answer in the form y=mx+c.
(b) N is the point on PQ such that PN=2NQ. Find the co-ordinates of N.
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Ответ:
see explanation
Step-by-step explanation:
(a)
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
Calculate m using the slope formula
m =![\frac{y_{2}-y_{1} }{x_{2}-x_{1} }](/tpl/images/1239/3757/287b9.png)
with (x₁, y₁ ) = (P(16, 9) and (x₂, y₂ ) = Q(22, 24)
Given a line with slope m then the slope of a line perpendicular to it is
y = -
x + c ← is the partial equation
To find c substitute (5, 1) into the partial equation
1 = - 2 + c ⇒ c = 1 + 2 = 3
y = -
x + 3 ← equation of perpendicular line
(b)
Given PN = 2NQ , then N sections PQ in the ratio 2 : 1
Using the Section formula to find coordinates of N
N = (
,
)
= (
,
)
= (
,
)
= (20, 19 )
Ответ:
2 inches
Step-by-step explanation:
idk how but it is