draw a perpendicular line from the directrix passing through the focus, this will be the line of symmetry.
The vertex(h, k) will be located on the line half way between the focus and directrix.
The distance from the focus to the vertex is called the focal length, call it a. The then equation is
(x - h)^2 = 4a(y - k)
the equation can be manipulated to
y = 1/4a(x - h)^2 + k
hope it helps
Answer:
Hi there!
Your answer is:
To get from step 3 to step 4, Lloyd added 36 to both sides. On the left side, this equaled 0 due to the additive inverse property! (-36 + 36 = 0!) On the right side, 36 is added to 216! (216+36 = 252)
Answer:
yes as x increases by 10, y increased by 2
The best way to do this is to set up a proportion
30 20
---- = -----
0.5 x
then cross multiply and divide
20 × 0.5 = 10/30=1/3
he needs 1/3 tank of gas to drive 20 miles
I hope I've helped!
