Which Jackson? Mississippi, Tennessee, Missouri, Michigan, Louisiana and Alabama just to name a few.
Nevada
The capital city that is about 400 miles east of Algiers, Algeria is Tunis, the capital of Tunisia.
"The capital city southeast of Los Angeles" is not a well-defined term, so it's impossible to answer the question as asked. Mexico City is "southeast of Los Angles", if we're not too picky about the definition of "southeast". So are most of the capital cities of Central and South America. (So is Miami FL, for that matter.)
If you start in Los Angeles and travel about 300 miles southeast, you would reach Phoenix, Arizona, which is the capital city of Arizona. From there, traveling north for 400 miles would take you into northern Arizona, and then heading west for another 200 miles would bring you into California. Therefore, you would end up in California.
Tunis, the capital and the largest city of Tunisia, is 400 miles east of Algiers, Algeria.
No capital city is located 400 miles northwest of Bangkok Thailand. Naypyidaw, the capital city of Myanmar, is 500 miles northwest of Bangkok, the capital city of Thailand.
When you go 300 miles southeast you will reach Needles. If you go up 400 miles north then you will arive in San Bernardino. Go 200 Miles West you will arrive in North Hollywood
Tunis is the capital and the largest city of Tunisia. Tunis is located approximately 400 miles east of Algiers, Algeria.
According to the map I looked at it is Tunis, Tunisia.
Approximately 400 miles or 381.88 miles according to MapQuest.
About 400 miles, you can measure on Google Earth
Approximately 400 miles or 381.88 miles according to MapQuest.