Answer:
X<-19
Step-by-step explanation:

I think for number 3, it is the third option.
The answer is $382.80. the perimeter is 600ft. if fence post are placed every five feet, you need 120 post because 600÷5 is 120. each post cost 3.19 so you need 382.80 because 3.19×120 is 382.8
Answer:

Step-by-step explanation:
Isolate the variable by dividing each side by factors that don't contain the variable.
Answer:
144
Step-by-step explanation:
12x12=144