Solve for x. *

Also, Are the angles complementary or supplementary?

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

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?

If private savings 'v' = 0.75s and total savings 's' equals $4.20 billion, solve for public and private savings.