Answer:
21 miles
Step-by-step explanation:
Each of the distances is the same, so we have ...
5x +4 = 15x -30
34 = 10x
3.4 = x
Then the distances are ...
5(3.4) +4 = 21 . . . . miles
Bert and Ernie each live 21 miles from Big Bird's nest.
Answer:
hard
Step-by-step explanation:
The polar equation of an ellipse is .
The vertices of ellipse are (−1,0) and (3,0).
The polar equation of an ellipse can be represented as
where e is the eccentricity.
Eccentricity, e =
c is the distance from the center to the focus and a is the distance from the center to the vertex
⇒
⇒ c = 2
⇒
⇒ a = 1
Then, e =
⇒ e = 2
Now, the polar equation of an ellipse becomes as,
⇒ ------- (1)
Now plug in a vertex point such as (-1,0) and solve for p,
⇒
⇒ [∵ cos 0 = 1]
⇒
⇒
⇒
Thus the polar equation of an ellipse (1) becomes as,
⇒
⇒
Hence we can conclude that the polar equation of an ellipse is .
Learn more about polar equation of an ellipse here
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'Three more' What is(are) the other one(s)?
Answer:c=(-15-9d)/6
Step-by-step explanation:
15=-3(2c+3d)
Open brackets
15=-6c-9d
Add 9d to both sides
15+9d=-6c-9d+9d
15+9d=-6c
Divide both sides by -6
(15+9d)/-6=-6c/-6
-(15+9d)/6=c
c=-(15+9d)/6
c=(-15-9d)/6