Answer:
D
Step-by-step explanation:
The rest you can elimate because of obvious inferring and reasoning so process of elimination
Answer:
4
Step-by-step explanation:
because i know how to do it
Answer:
a. 
b. 
c. 
d. -6t - 5
Step-by-step explanation:
When a number has the same variable as another, you can add or subtract them
So for the first one, you can do

(But don't forget the
!)
So it is:

Continue this process for the rest of them