Answer:
Step-by-step explanation:
Given : focus of (1, -3) and a directrix of y= -1
The distance between focus and directrix is 2p
The distance between (1,-3) and y=-1 is 2
So 2p = 2 and p =1
Vertex (h,k) lies inbetween the focus and directrix
focus is (h, k-p)
given focus is (1,-3)
so h=1 and k-p = -3 ( we got p =1)
So k-1= -3 , k= -2
Hence, vertex is (1,-2), h=1 and k = -2
Here focus at the bottom and directrix at the top
so parabola opens down
hence a= -1/4
Plug it in the equation
So 48 and (3x+12) are congruent by Alternate Exterior Angles, so all you need to do is equal them to each other and solve.
Firstly, subtract 12 on each side:
Then divide both sides by 3, and your answer should be , or B.
0.01x=0.6
0.01x/0.01=0.6/0.01
x=0.6/0.01 (simplify)
x=60
Answer:
A
Step-by-step explanation:
b^2 = 400
b = 20.............