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nataliatf3062
31.12.2020 •
Mathematics
Which of these is a point-slope equation of the line that is perpendicular to
y- 25 =2(x- 10) and passes through (-3, 7)?
A. y-7= -2(x+ 3)
B. y+7=--3)
C.y-7- -x+3)
D. y+7 = 2(x- 3)
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Ответ:
Given:
Equation of line is
.
A line is perpendicular to the given line and passes through (-3,7).
To find:
The point slope form of the perpendicular line.
Solution:
Point slope form of a line is
where,
is the point from which the line is passing through and m is slope.
We have,
From (i) and (ii), we get
Product of slopes of two perpendicular lines is -1.
So, slope of perpendicular line is
.
Point slope form of the perpendicular line is
Therefore, the correct option is C.
Ответ:
The answer is B.
Step-by-step explanation: