Answer:
Step-by-step explanation:
The relationship between the focus, directrix, and semi-major axis is ...
foci are ±ae
directrices are ±a/e
where "a" is the length of the semi-major axis and e is the eccentricity.
Using the given focus and directrix locations, we have ...
ae = 2
a/e = 4
When we multiply these equations, we have ...
(ae)(a/e) = (2)(4)
a^2 = 8
This is the denominator of the x^2 term in the equation for an ellipse:
x^2/a^2 + y^2/b^2 = 1
_____
We can find b^2 from ...
ae = √(a^2 -b^2)
b^2 = (a^2 -(ae)^2) = 8 -2^2 = 4
So, our ellipse equation is ...
x^2/8 +y^2/4 = 1 . . . . . . matches the first choice
Answer:
$4 for each person
Step-by-step explanation:
First we have to calculate how much money has money other than for food
for this we multiply the number of guests by the value of each dinner
$8 * 10 = $80
Now that we have the total value of the dinner we substract from the total money
$120 - $80 = $40
This is the mount that she can spend on party favors
Then we split the $40 with the total number of guests to know how much we can spend for each person
$40/10 = $4
Step-by-step explanation:
hereee is your answerr
hope it helps
Answer:
168 km
Step-by-step explanation:
5h . 60 = 300 min.
14 : 25=0,56
0,56 . 300 = 168 km
F(x) = (x − 1)(x − 2)(x − 3)
