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aavil5659
08.10.2019 •
Mathematics
Which lines are perpendicular to the line y – 1 = one-third(x+2)? check all that apply.
y + 2 = –3(x – 4)
y − 5 = 3(x + 11)
y = -3x – five-thirds
y = one-thirdx – 2
3x + y = 7
Solved
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Ответ:
First option.
Third option.
Fifth option.
Step-by-step explanation:
The equation of the line in Slope-Intercept form is:
Where "m" is the slope and "b" is the y-intercept.
The equation of the line in Point-slope form is:
Where "m" is the slope and
is a point on the line.
By definition, the slopes of perpendicular line are negative reciprocals.
Then, given the line:
We know that a line perpendicular to it, must have this slope:
Let's check each option:
1)![y + 2 = -3(x -4)](/tpl/images/0301/0206/2dc0e.png)
Since
, this line is perpendicular to the line ![y- 1 = \frac{1}{3}(x+2)](/tpl/images/0301/0206/bea1b.png)
2)![y - 5 = 3(x + 11)](/tpl/images/0301/0206/1d3c1.png)
Since
, this line is not perpendicular to the line ![y- 1 = \frac{1}{3}(x+2)](/tpl/images/0301/0206/bea1b.png)
3)![y = -3x-\frac{5}{3}](/tpl/images/0301/0206/6436c.png)
Since
, this line is perpendicular to the line ![y- 1 = \frac{1}{3}(x+2)](/tpl/images/0301/0206/bea1b.png)
4)![\frac{1}{3}x - 2](/tpl/images/0301/0206/cc8a5.png)
Since
, this line is not perpendicular to the line ![y- 1 = \frac{1}{3}(x+2)](/tpl/images/0301/0206/bea1b.png)
5)![3x + y = 7](/tpl/images/0301/0206/8b2b8.png)
Solving for "y":
Since
, this line is perpendicular to the line ![y- 1 = \frac{1}{3}(x+2)](/tpl/images/0301/0206/bea1b.png)
Ответ:
Step-by-step explanation: