Answer:
No, it is not.
Step-by-step explanation:
This is not proportional, however, it is linear
Answer:
11 lots are for sale.
Step-by-step explanation:
This is as simple as:

Since Mr. Smith divided the land into 1/2 acre lots, you'd just divide it by the amount he has.
Answer:
To find the area of a triangle you multiply the base times height then divide that number by 2.
Step-by-step explanation:
Say I had a triangle who's base was 7in and the height was 12in.
Then you multiply 7 times 12=84in
Then divide 84 by 2 which would equal 42
X Can't get greater than 10 but it can be -10 so x has to be lesser then 10.
Answer:
Area: A = 42x - 49
Step-by-step explanation:
Area of rectangle = L * W
Plug in
A = 7 * (6x - 7)
A = 42x - 49