Aweb browser has 50 bookmarks. they are described in the table. give the ratio(in simplest form) of cooking bookmarks to games bookmarks. plz will mark the brainliest!

Richard save $32 in march he saved $48 in april and $38 in may then richard spent $113 on a keyboard how much money does richard have left

I'm confused on this could anyone me and show me what i need to do to solve it.

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?