Pluto moves in an elliptical orbit with the sun at one of the foci. The length of half of the major axis is 
kilometers, and the eccentricity is 0.2488. Find the perihelion distance of Pluto from the sun. Round your answer to the nearest kilometers.
?
A. 7,375,412,800 kilometers
B. 4,436,587,201 kilometers
C. 4,436,587,200 kilometers
D. 8,873,174,399 kilometers
E. 8,873,174,401 kilometers
Answer: C
Mathematics
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Find the focus and the directrix of the parabola.y = 2x2 - 8x + 7
A. Focus: 
; directrix: y = - 
B. Focus: 
; directrix: y = - 
C. Focus: (2, 7); directrix: x = 9
D. Focus: (2, 1); directrix: x = -3
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Graph the equation using the intercept method. Label the intercepts on the graph.
?
?
A.
B.
C.
D.
E.
Mathematics
Determine if the ordered triple is a solution to the given system.
; (5, 4, -5)
A. Yes B. No
Mathematics
Use a graphing calculator to solve the equation to the nearest tenth.x2 - 2x - 1 = 0
A. 2.4, -2.4 B. 2.4, -0.4 C. 0.4, -0.4 D. 0.4, -2.4
Mathematics