The sum of the digits of a two digit number is 6 when the numbers are reversed the number decreases by 18

Moira has a canvas that is 8 inches by 10 inches. she wants to paint a line diagonally from the top left corner to the bottom right corner. approximately how long will the diagonal line be?

Which letters from the table represent like terms? a and b b and c a and d b and d

Table which ratio is equivalent to 3: 7? 6: 7 3: 21 24: 56 15: 30