7^0=1
7^1=7
7^2=7*7=49
7^3=7*7*7=343
etc... etc...
Answer:
Step-BYU-step explanation
4z - (-3z) = 4z + 3z = 7z
For this case we assume that the initial amount of money is $20.
So:
of $20 in movies:
![\frac {1} {5} (20) = 4](https://tex.z-dn.net/?f=%5Cfrac%20%7B1%7D%20%7B5%7D%20%2820%29%20%3D%204)
of $20 in snacks:
![\frac {3} {8} (20) = 7.5](https://tex.z-dn.net/?f=%5Cfrac%20%7B3%7D%20%7B8%7D%20%2820%29%20%3D%207.5)
of $20 in games:
![\frac {2} {7} (20) = 5.71](https://tex.z-dn.net/?f=%5Cfrac%20%7B2%7D%20%7B7%7D%20%2820%29%20%3D%205.71)
Adding we have:
![4 + 7.5 + 5.71 = 17.21](https://tex.z-dn.net/?f=4%20%2B%207.5%20%2B%205.71%20%3D%2017.21)
Ken has:
![20-17.21 = 2.79](https://tex.z-dn.net/?f=20-17.21%20%3D%202.79)
Answer:
Ken can spend what he planned and he has $2.79 left.
You need to multiply 19.797 by 10 two times to reach 1979.7
Answer:28
Step-by-step explanation: