Match each table showing a proportional relationship between x and y with its constant of proportionality.

Brady has a 20 year fixed rate mortgage for $215,500 with monthly payments of 1,305.89.the annual interest rate is 4%. what is the total cost of the principal and interest for this loan rounded to the nearest dollar

When i add money am i supposed to make it like this 7+12 or 7.00+12.00 because i got 19 dollars for my answer

Josephine has a great garden with and area of 2x2 + x - 6 square feet