Answer:
a) see the attached file
b) Coordinates of vertex = (0, 4)
Step-by-step explanation:
Given:
Focus of parabola is and the directrix is
To sketch: the parabola
To find: coordinates of the vertex
Solution:
As the focus lies on the y-axis and y-coordinate of the focus is positive,
equation of parabola is
Here, denotes the vertex of parabola, focus is and the directrix is
According to question,
So,
On adding these equations,
Put in
So, equation of parabola is
For part a), see the attached file.
b)
Coordinates of vertex =
None of the above answers are correct, the correct answer would be 15
Answer:
5
Step-by-step explanation:
Dilation = dividing original by (number) to = dilated version.
10/5=2
Dividing 10 by 5 to = 2
(10=original size) (2=dilated size)
Answer:
5:3
Step-by-step explanation:
So, ratio of girls to boys is 20:12 . You can reduce this ratio, the same way you reduce a fraction. Both numbers have a common fact of 4 , so divide both by 4 . In simplest form, this ratio is 5:3 .