Write and expression for the calculation triple 3 and then add double 8

The answer would be:

(3 x 3) + (8 x 2) = 25

When you triple something, you multiply it by 3 or add the number to itself 3 times. When you double something, you multiply it by 2.

So when you triple three, you are multiplying 3 by 3. When you are doubling eight, you are multiplying 8 by 2.

(3 x 3) + (8 x 2)

9 + 16 = 25