Find the product of (2z+1) and (3z-6) when z=4

For the answer to the question above, that should be easy.
Just replace the z into 4.

(2z+1) will be (2(4)+1)
Thus, (8+1)
Then the answer would be 9

Same as the second one
given: 3z-6
Just change it into z into 4

so 3(4)-6

(12-6)
So the answer would be 6

Then the final answer for the two equations are

4 and 6
if you would multiply it. you'll get 54

I hope my answer helped you.

The answer is 54 and I have added a photo so you can understand it

What is the inequality?