I need help, please help me man.

What is y-5=3(x+1) in slope intercept form

Akayaker travels 3 miles upstream and 3 miles downstream in a total of 4 hours. in still water, the kayaker travels at a speed of 2 mph. what is the average speed of the river's current?

Cindi bought a sheet pizza for a party. some of the pizza has pepperoni, some has onions, and the rest of it has both. two-fifths of the pizza has just pepperoni and one-third of the pizza has just onions. what fraction of the pizza has both pepperoni and onions? answer asap