Answer:
The equation
represents the equation of the parabola with focus (-3, 3) and directrix y = 7.
Step-by-step explanation:
To find the equation of the parabola with focus (-3, 3) and directrix y = 7. We start by assuming a general point on the parabola (x, y).
Using the distance formula
, we find that the distance between (x, y) is

and the distance between (x, y) and the directrix y = 7 is
.
On the parabola, these distances are equal so, we solve for y:

Answer:
f(x) = 3(1.007)x; spreads at a rate of approximately 0.07% daily
Step-by-step explanation:
c is incorrect
Answer:
no it is 0.4
Step-by-step explanation:
5x(2-4)=2(5x-4)
10x-20x=10x-8
-20x=-8
20x=8
10x=4
x=0.4
Answer:
2.5n=10 n = 4
Step-by-step explanation:
sum is addition
twice n and a half is 2.5n
equals 10
10 divided by 2.5=4