Answer:
The area of the triangle is of 21 units of area.
Step-by-step explanation:
The area of a triangle with three vertices
is given by the determinant of the following matrix:

In this question:
Vertices (3,0) (9,0) (7,6). So




The area of the triangle is of 21 units of area.
B :) open circle means inequality and it needs to be at least 3 so the line has to increase, meaning the arrow is going right.
Answer:
$1008
Step-by-step explanation:
slope is 60/5.
(60/5)×84=1008