The equator crosses through three continents: Asia, Africa, and South America.
http://wiki.answers.com/Q/How_many_continents_does...

2x. 2. 5x  3 = 0. A quadratic equation expressed in the form ax. 2. bx + c = 0 has two real and distinct roots when b. 2. 4ac is positive. Using the figures from the supplied equation
http://wiki.answers.com/Q/How_many_real_roots_does...

Every point along the equator gets a little more than 12 hours of daylight every day.
http://wiki.answers.com/Q/How_many_hours_of_daylig...

A single linear equation in two variables has infinitely many solutions. Two linear equations in two variables will usually have a single solution  but it is also possible that they
http://wiki.answers.com/Q/How_many_solutions_does_...
