Molly, Ryan and Bianca are cousins. Molly is nine years old. Ryan is four years older than Molly. Bianca’s age is why years less than twice Ryan’s age, write an expression that represents Ryan’s age in terms of M.
Let M represent Molly's age.
Ryan is four years older than Molly, so his age would be M + 4.
Bianca's age is why years less than twice Ryan's age, so her age would be 2(M + 4) - y.
Therefore, an expression that represents Ryan's age in terms of M would be M + 4.