Word Problems to Expressions Practice Test

Tom has $n$ nickels and $q$ quarters. He spends half of his quarters and receives $3$ more nickels. Which expression represents the total value of his coins in cents after these transactions?

Maria earns $d$ dollars per hour for regular work and $1.5d$ dollars per hour for overtime work. Last week she worked $r$ regular hours and $t$ overtime hours. Which expression represents her total earnings for the week?