What is -a^-2 of a =-5. a.-25. b.25. c.-1/25. d.1/25

Solve by any method (graphing, substitution or linear combination)y = x - 82x + 3y = 1a) (2, -6)b) (5, -3)c) (4, -4)d) (0, -8)i figured it out. the answer is (5, -3)

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

What is the sum of the first 8 terms of the geometric series