3(5+2x)+4 x=1455

To evaluate the expression 3(5+2x)+4 when x=1455, we substitute the value of x into the expression:

3(5+2(1455)) + 4

Simplifying the inner parentheses:

3(5+2910) + 4

Calculating:

3(2915) + 4

Multiplying:

8745 + 4

Adding:

8749

Therefore, when x=1455, the expression 3(5+2x)+4 evaluates to 8749.