Consider the attached ellipse. Let the sun be at the right focus. Then perihelion is at right vertex on the x-axis and aphelion is at the left vertex on the x-axis.
The distances:
- from perihelion to the sun in terms of ellipse is a-c;
- from aphelion to the sun in terms of ellipse is a+c.
Then
Add these two equations:
and subtract first equation from the second:
Note that 
thus
The equation for the planet's orbit is
If the fraction is 7/8, the top number would be the numerator. So the numerator is 7.
1- B
2- C
3- B
4- D
5- D
6- C
7- B
8- C
9- C
10- C
Hope I helped you!!
I really think that I got them all right.. PLEASE tell me if I got any wrong so that I can change them :) Its been a while since I've done this... XD
Answer:
x > 5.5
Step-by-step explanation:
4(x - 3) - (2x - 1) > 0
4x - 12 - 2x + 1 > 0
4x - 2x - 11 > 0
2x - 11 > 0
2x - 11 + 11 > 0 + 11
2x > 11
2x ÷ 2 > 11 ÷ 2
x > 5.5
Answer) 7/24
This picture should help you understand how I got the answer
