Answer:
The total earnings for the two days is (15+d) dollars
Explanation:
The total earning for the two days can be expressed as;
C=M+T
where;
C=total earnings for the two days
M=total earnings on Monday
T=total earnings on Tuesday
In our case;
M=$15
T=d
replacing;
C=(15+d)
The total earnings for the two days is (15+d) dollars