What is the sum of the square root of negative 2 and the square root of negative 18

Haruka hiked several kilometers in the morning. she hiked only 66 kilometers in the afternoon, which was 25% less than she had hiked in the morning. how many kilometers did haruka hike in all?

Segment an is an altitude of right δabc with a right angle at a. if ab = 2, squared 5 in and nc = 1 in, find bn, an, ac.

Which answer choice is it? is it the first ,second, third or fourth giving 40 points for whoever answers correctly you