Answer:
Davide's age is 10.
L'età di Davide è 10.
Step-by-step explanation:
The average age of Aldo, Bruno, Carlo and Davide is 16 years.
I am going to say that:
x is Aldo's age.
y is Bruno's age.
z is Carlo's age.
w is Davide's age.
Average of the 4 is 16 years.
This means that:
![16 = \frac{x + y + z + w}{4}](https://tex.z-dn.net/?f=16%20%3D%20%5Cfrac%7Bx%20%2B%20y%20%2B%20z%20%2B%20w%7D%7B4%7D)
![x + y + z + w = 64](https://tex.z-dn.net/?f=x%20%2B%20y%20%2B%20z%20%2B%20w%20%3D%2064)
If we do not consider Davide, the mean is 18. So
![18 = \frac{x + y + z}{3}](https://tex.z-dn.net/?f=18%20%3D%20%5Cfrac%7Bx%20%2B%20y%20%2B%20z%7D%7B3%7D)
![x + y + z = 54](https://tex.z-dn.net/?f=x%20%2B%20y%20%2B%20z%20%3D%2054)
Replacing in the first equation:
![x + y + z + w = 64](https://tex.z-dn.net/?f=x%20%2B%20y%20%2B%20z%20%2B%20w%20%3D%2064)
![54 + w = 64](https://tex.z-dn.net/?f=54%20%2B%20w%20%3D%2064)
![w = 10](https://tex.z-dn.net/?f=w%20%3D%2010)
Davide's age is 10.
L'età di Davide è 10.
Answer:
C) Exponential
Step-by-step explanation:
If you divide the consecutive y-values, you'll get a consistent result of 2:
16/8 = 2
8/4 = 2
4/2 = 2
2/1 = 2
This type of pattern corresponds to an Exponential Function.
Answer:
15 hrs
Step-by-step explanation:
every hour is $10, so divide 150 by 10
Answer:
Step-by-step explanation:
18). Graph represent a function
19). Graph does not represent a function