Mean- 2
median- 2
mode- 1&2
range- 3
16 + p = t
t = total number of photos that LayTonya and Luis have
For this case we must add the terms of the following expression:

It is noted that the terms are similar, so we can add:
We take common factor 

We add the terms within the parenthesis:

finally we have:

Answer:

The first one is c.
3x+5<23
-5. -5
3x=18
X=6
The second one is d