How many different 6-digit license plates can be made if the first digit must be 0 and no digits may be repeated

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).

At a local museum, the total price for one adult and one child is $11. mrs. smith paid for herself and her three children. she spent $19. record the system of equations to be solved and then find the price of an adult and child ticket using either elimination or substitution.

Marco states that 7.696696669…… is a rational number because it is a repeating decimal. is he correct? justify your answer.