Answer:
7 6/12
Step-by-step explanation:
Sadie took 47 minutes to finish her test.
Let Laura's time be x minutes.
Then we have:
x + 3x - 16 = 68
4x = 84
x = 21 minutes.
So Sadie took 3(21) - 16 = 63-16
= 47 minutes.
Answer: -5.2
A