How do you do this I have no idea

What is x and y intercepts for y=x+7

Ebuka's monthly rent is $750. if ebuka pays the rent late, his landlord charges 4% interest per week that the payment is late. write a function that gives the total cost r(t), in dollars, of ebuka's rent if he pays it t weeks late.

If you have 12 feet of string and you cut it into equal length of 5 inches each how much string will be left