What is the smallest positive number that can be added to 5 so that the resulting number and 45 have 9 as their greatest common factor? A.5 B. 8 C. 9 D.17

Rose and andrew are financing $128,000 to purchase a condominium. they obtained a 15-year, fixed-rate loan with a rate of 5.05%. they have been given the option of purchasing up to four points to lower their rate to 4.81%. how much will the four points cost them?