Evaluate Expressions Practice 1. Evaluate the expression at specific values of their variables. Evaluate 24 / a + b, when a = 6 and b = 12.

To evaluate the expression 24 / a + b, substitute a = 6 and b = 12 into the expression:

24 / 6 + 12

To simplify, first perform the division:

= 4 + 12

Then add:

= 16

Therefore, the value of the expression at a = 6 and b = 12 is 16.