Website slow/Images won't load

Slowness/high CPU usage could be due to (but not limited to):
– a poor or memory intensive theme. switch to the default theme and test loading time
– poor or memory intensive plugins. one by one disable plugins and test loading time
– your server is slow (e.g., “process hang”, overload, you get a lot of visitors, other problems, etc.).

Test your site at (free online testing): http://gtmetrix.com/leverage-browser-caching.html
OR
http://www.webpagetest.org/

Also, review these resources:
– http://www.wptavern.com/determining-which-plugins-are-slowing-your-site-down
– http://wordpress.stackexchange.com/questions/656/is-there-a-way-to-measure-server-resource-cpu-usage-by-wp-plugins/
– http://wordpress.tv/2013/02/28/vinay-paudel-optimizing-and-speeding-up-a-wordpress-site/
– http://www.wptavern.com/my-performance-woes
– http://codex.wordpress.org/WordPress_Optimization
– http://codex.wordpress.org/High_Traffic_Tips_For_WordPress
– http://codex.wordpress.org/WordPress_Optimization/Caching
– http://codex.wordpress.org/WordPress_Optimization/WordPress_Performance
– http://wptavern.com/speed-up-your-wordpress-site-with-pound-varnish-nginx-and-mod_pagespeed

Speed up admin: http://wordpress.stackexchange.com/questions/166727/how-can-i-speed-up-my-wp-admin-section/167014#167014