Answer:
B. 140
Step-by-step explanation:
Basically, what this problem is saying is that each term x is 1.5 times the value of the previous term.
Now, we can set up a few equations
48=1.5a
c=1.5(48)
d=1.5c
Solving the first one gives us a=32
Solving the second one gives us c=72
Solving the third one gives us d=108
Thus, a+d=32+108=140
