Let the number of hours she spent in baby- sitting is x
and the number of hours she spent in music lessons is y.
Now, we have been given that she worked a total of 18 hours. Hence, we have
And she made $139. Thus, we have
Substituting the value of y from equation 1 in 2, we get
Therefore, she spent 11 hours in baby-sitting.
Answer:
.
Step-by-step explanation:
49
7^1=07
7^2=49
7^3=343
7^4= 2301
7^5= 16807