30. Cory earns \( d \) dollars for every hour he works after school. On the weekends, his hourly wage is three times the sum of his after school wage and \( \$ 2 . \)
a. Write and simplify an expression that represents Cory's weekend wage. \( x = 3 ( \phi + 2 ) \)
Simplificd: \( x = 3 d + 6\)
b. Write and simplify an expression that represents the total amount of money Cory earns each week if he works \( 12 \) hours after school and \( 8 \) hours during the weekend.