Find the distance between the two points rounding to the nearest tenth (if necessary). (8, -9) (2, -7)

When i add money am i supposed to make it like this 7+12 or 7.00+12.00 because i got 19 dollars for my answer

What is true about the dilation? it is a reduction with a scale factor between 0 and 1. it is a reduction with a scale factor greater than 1. it is an enlargement with a scale factor between 0 and 1. it is an enlargement with a scale factor greater than 1.

Need on this one asap im almost done with this subject