Evaluate 3 + 11t - 9u when t = 9 and u = 11

To evaluate 3 + 11t - 9u when t = 9 and u = 11, substitute the values of t and u into the expression:

3 + 11(9) - 9(11)

Simplifying the expression:

3 + 99 - 99

Combining like terms:

3

Thus, when t = 9 and u = 11, the value of 3 + 11t - 9u is 3.