Answer:
The expressions could represent the average time at the hospital after the outbreak is
or
.
Explanation:
Consider the provided information.
The average wait time at a hospital increased by 70 percent.
Let M represents the average wait time at the hospital before the outbreak..
The average wait time at the hospital after the outbreak is increase by 70.
70% of M can be written as:

Now add 70% of M with m.




Hence, the expressions could represent the average time at the hospital after the outbreak is
or
.