I had the similar test and got it right so it should be B
3x - 36 + 2x + 26 = 180
5x - 10 = 180
5x = 180 + 10
5x = 190
x = 190/5
x = 38 <==
B because if you use the equation given and plug a 1 in for the t, you would get 22 which is where the graph is at for 1.
It's too blurry you might want to retake the picture
Missing Value = 5
15+30=5(3+6)
Distribute
45=15+30
Simplify
45=45
