Luis wants to buy a skateboard that usually sells for $79.68. All merchandise is discounted by 12%. What is the total cost of th
1 answer:
You might be interested in
Answer with explanation:
Relation between Speed , Distance and time
Distance =Speed × Time
→It means Speed is inversely Proportional to time.
As distance will remain constant , in that frame of reference
If speed of light in a Medium
Then, time taken to cross the medium = t seconds or hours or another unit of time.
Now, If speed of light is 50% of the speed of light relative to us
That is Speed of light in another medium
Then, time taken to cross the medium = 2t seconds or hours or another unit of time.
Using Unitary Method
A standard form of the equation of a rotated parabola is
(y - k)² = 4p(x - h)
where
(h, k) is the location of the vertex.
(h+p, k) is the location of the focus.
The directrix is the line x = h - p
Because the focus is at (-1, 4), therefore
h + p = -1 (1)
k = 4 (2)
Because the directrix is x = 5, therefore
h - p = 5 (3)
Add equations(1) and (3) to obtain
h + p + (h - p) = -1 + 5
2h = 4
h = 2
From (1), obtain
p = -1 - h = -1 - 2 = -3
The equation of the parabola is
(y - 4)² = -12(x - 2)
Answer: (y - 4)² = -12(x - 2)
(y - k)² = 4p(x - h)
where
(h, k) is the location of the vertex.
(h+p, k) is the location of the focus.
The directrix is the line x = h - p
Because the focus is at (-1, 4), therefore
h + p = -1 (1)
k = 4 (2)
Because the directrix is x = 5, therefore
h - p = 5 (3)
Add equations(1) and (3) to obtain
h + p + (h - p) = -1 + 5
2h = 4
h = 2
From (1), obtain
p = -1 - h = -1 - 2 = -3
The equation of the parabola is
(y - 4)² = -12(x - 2)
Answer: (y - 4)² = -12(x - 2)