The tens digit of a certain number is five more than the units digit. the sum of the digits is 9. find the number. i need to turn this in in 20 minutes

Alonso walked with his friend andy one day, and wanted to compare their speeds. alonso walked 3 miles in one hour, and andy walked 2 miles in 2 hours. complete the table to graph the relationship for each person.

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).

If rt is greater than ba, which statement must be true ?