Discover Questions

Lim x-> 3 (2x+1)=7 what values of x guarantee that f(x)=2x+1 is within 0.54 units of 7? please help me? Why does the sun always go away when it gets dark outside? Find the equation of an ellipse with center at (1,1), and vertex at (1,3), and which passes through the origin? In an xy plane, a line contains (4,n) (n,8), and (2,4). what is a possible value of n?
A) 2
B) 4
C) 6
D) 8? What would happen if the Suns luminosity dropped by 2 percent for 50 years???