I need help I don’t understand at all ?

Measure of angles 31 (x+4) (3x+9) me

Susan is paying $0.30 per $100 on her $483,000 home in homeowners insurance annually. if her annual homeowners insurance premium is divided into twelve equal monthly installments to be included on each of her monthly mortgage payments of $2,128.00, what is her total monthly payment?

Write a function rule for  “the output is  5 less than the input.” let  x be the input and let  y  be the output.