209, 205, 201, ... Find the 38th term

Me solve this problem, and someone clearly explain to me how to solve it.1.) use the value of the discriminant to determine if the given trinomials has 2 real solutions, 1 real solution, or no real solutions. a.  x2  − 4x  − 7 = 0b. 4r2  + 11r  − 3 = 0c. 3m2  + 7 = 0d.  t2  + 2t  + 1 = 0

Bring the fraction a/a-4 to a denominator of 16-a^2

The distance between two points is 6.5cm and scale of map is 1: 1000 what's the distance between the two points