The answer is 36 because in order to find area you multiply length and width so:
A= L x W
9 x 4 = 36
20 because 10+10=20 and 20+20=40 and 20+40=60
Answer:
it is really true
Step-by-step explanation:
good question

the domain:

the equation:

4 is in the domain
-2 is not in the domain
The answer:

***
Also, the answer in 13 is {8}. -3 is not in the domain. Replace x with -3 and you'll see:

It's not true so -3 isn't a solution to this equation.
560 ft^2
20ft x 10ft = 200 ft^2
+
12ft x 30ft = 360 ft^2
=
560 ft^2