Why did the Roman have to give each number a different letter?

45 was divided by a power of ten to get 4.5. what power of ten was it divided by? people 4.5

Frank owns a $141,000 home, for which he has a 30-year mortgage in the amount of $700 a month. once he has paid off mortgage, how much will he have paid in investment? a. $111,000 b. $109,000 c. $120,000 d. $141,000

Look at triangle wxy what is the length (in centimeters) of the side wy of the triangle?