How do i make a common denomonaitor for 1/3+4/5 ?

Adeposit of 5500 at 6% for 3 years equals

Avery’s piggy bank has 300 nickels, 450 pennies, and 150 dimes. she randomly picks three coins. each time she picks a coin, she makes a note of it and puts it back into the piggy bank before picking the next coin.

Which linear inequality is represented by the graph?