Mary is twice as old as sam. joe is three times as old as mary. the sum of the ages of sam, mary, and joe is 72. how old is each person

Complete the statements about the system of linear equation respresented by the tables the equation respented the left table is

At the beginning of 1974/75,2 years a man invested #2000 in a bank at 12.5% compound interest, if it degree #650 at the end of each two years to pay his son's school fees, after payment of interest to pay his son's school fees, how much did he have left at the beginning of the 1978/79 school year?

Can someone me with these two circle theorem questions asap?