In the model, the basic logical structure is represented as an upside-down tree.

hierarchical

Step-by-step explanation:

In the hierarchical model, the basic logical structure is represented as an upside-down tree. A hierarchical model is a type of data model, it is a tree-like model in which lower levels/groups are sorted under a hierarchy of higher-level unit (like sorting the staffs of a department in a company under the head of department). The levels are connected to one another through links. A simple pictorial representation of the hierarchical data model is shown in the attachment

exa:

)

3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.