How many pair combinations of numbers are there possible using 1000 numbers were duplicate numbers example 11 would be a new combination and diferant number order of numbers would also be considered as a different pair. example a b and b a would be considered as a different pair. so, do the math and tell me how pairs i can have this 1000 different numbers or letters or objects or graphics or whatever can i have with the 1000?

Igure 1 and figure 2 are two congruent parallelograms drawn on a coordinate grid as shown below: 4 quadrant coordinate grid showing two parallelograms. figure 1 has vertices at negative 5, 2 and negative 3, 4 and negative 4, 7 and negative 6, 5. figure 2 has vertices at 5, negative 2 and 7, negative 4 and 6, negative 7 and 4, negative 5. which two transformations can map figure 1 onto figure 2? reflection across the y-axis, followed by reflection across x-axis reflection across the x-axis, followed by reflection across y-axis reflection across the x-axis, followed by translation 10 units right reflection across the y-axis, followed by translation 5 units down