Answer:

Step-by-step explanation:
Look at the picture.
We have two triangles and the trapezoid.
The formula of an area of a triangle:

b - base
h - height
The formula of an area of a trapezoid:

b₁, b₂ - bases
h - height
Triangle 1:
b = 3, h = 2

Triangle 2:
b = 6, h = 1

Trapezoid:
b₁ = 7, b₂ = 9, h = 6

The area of the figure:

Answer:
$10,089
Step-by-step explanation:
Add all numbers except for the room and board since student is choosing to live at home.
Answer:
No
Step-by-step explanation:
Each x can have only ONE y as its partner. In this relation, -1 has TWO different partners: in one point (-1,-4) the y is -4 and in another point (-1,2) the y is 2. Not a function.