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76022sfox
07.04.2021 •
Mathematics
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Ответ:
join
Step-by-step explanation:
meet./vyc-hwbw-svg
Ответ:
see explanation
Step-by-step explanation:
The equation of a line in point- slope form is
y - b = m(x - a)
where m is the slope and (a, b) a point on the line
(1)
Here m = 2 and (a, b) = (- 1, 3 ) , then
y - 3 = 2(x - (- 1) ), that is
y - 3 = 2(x + 1)
(2)
Here m = - 5 and (a, b) = (4, 0 ) the coordinates of the x- intercept
y - 0 = - 5(x - 4) , that is
y = - 5(x - 4)
Ответ:
(0,3) , y−3 Since the directrix is vertical, use the equation of a parabola that opens up or down. (x−h)2=4p(y−k)
Find the vertex.
The vertex (h,k) is halfway between the directrix and focus. Find the y coordinate of the vertex using the formula y=y coordinate of focus+directrix2. The x coordinate will be the same as the x coordinate of the focus.(0,3−32)
Simplify the vertex.
Subtract 3 from 3.(0,2) Divide 0 by 2.(0,0) Find the distance from the focus to the vertex.
The distance from the focus to the vertex and from the vertex to the directrix is |p|. Subtract the y coordinate of the vertex from the y coordinate of the focus to find p.p=−0Subtract 0 from 3.p=3