Let's say that x is the number of days he tweets. Now, if he tweets any number of days, we can represent all of that with just x. So out expression will look like:

Hope this helps!
Answer:
The answer is letter 'J'
Step-by-step explanation:
4(3+5) - 3 x 9^2
4(8) - 3 x 9^2 ← 9 x 9 = 81
16 - 3 x 9^2
16 - 3 x 81
13 x 81
1,053
Okay. So, the line shaded would have to be left to 2, because it's less than 2. In that case, A and C are eliminated, because they shade to the right, not left. B and D do this, but wait. The dotted line has to represent the less than, because the one that's fully filled in would mean less than or equal to. B would make sense, because the line is dotted and that makes an inequality symbol of less than, not less than or equal to. The answer is B.
Note: When the sign is < or >, the line on the graph is dotted. If the sign is <= or >=, then the line on the graph is solid.