What number is a common multiple of 5 and 9?

Which table shows a proportional relationship between miles traveled and gas used?

Find the perimeter of the triangle with vertices  d(3, 4),  e(8, 7), and  f(5, 9). do not round before calculating the perimeter. after calculating the perimeter, round your answer to the nearest tenth.  

1) prove that 731^3−631^3 is divisible by 100 2) prove that 99^3−74^3 is divisible by 25