Mrs. d. gives 13 % of her salary to a charity. last year she donated to the charity $6500.00. how much money did mrs. d. earn last year?

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

Find the interior angle of a regular polygon which has 6 sides

Graph the line y=4/3 x+1 . use the line tool and select two points on the line.