Answer:
20
Step-by-step explanation:

it's 0 years after so f(0)
The 3 is in the tens place, meaning the value of the 3 is 3x10.
The 9 is in the ones place, meaning the value of the 9 is 9x1
So the place value of the 3 is ten times the value of the place value of the 9.

What scale is used on the graph

b). 2 cm to 2 units on both axes
As we can se there is gap of 2 boxes (side length= 1cm of one box so 2 boxes side length= 2cm) between 2 units so we can conclude that scale is equal to 2 cm to 2 units on both axes

IT IS THE RELATIONSHIP BETWEEN THE UNIT USED AND ACTUAL VALUE ON THE GRAPH
Answer:
49/5
Step-by-step explanation:
x+x+x+x+x+30=79
5x+30=79
5x=49
x=49/5
The solution to the system of equation is (1, 4).
In order to find this, we can first just see where the graphs intersect each other. This will give us the solution set.
As for what it represents, the x value in the increase in temperature and the y value is the increase in customers.
Therefore, we know that we want the temperature to go up by 1 (although we don't know the units) and that would result in the amount of people coming, and staying longer by 4 (again, we don't know the units of measure).