Answer: The equation of the parabola is 
.
Explanation:
It is given that the focus of the parabola is (-5,-5) and the directrix is y=7.
The standard form of the parabola is,
Where y=k-p is directrix and (h,k+p) is the focus.
Since focus is given,
On comparing,
.... (1)
The directrix is y=7.
.... (2)
Add equation (1) and (2),
Put this value in (1).
Put p= -6, h= -5 and k=1 in the standard form of the parabola.
Therefore, the equation of parabola is .
No i don't but if u need anything else about this syndrome feel free to ask
Answer:
x = - 26
Step-by-step explanation:
Let the number be x.
According to the question,
Cross multiplying 4 & 3 gives :-
And solving this eqn. gives :-
Verification :-
(putting the value of x = -26 )
Reducing 
by 7 gives 
.
It would take 110 seconds or a minute and 40 seconds. 400 divided by 50 = 4...... 27.5 multiplied by 4 equals 110; therefore, the answer is mike would swim 400 meters in 110 seconds.
