The third one.
Because the answer of the absulate value equations is always positive.
Step-by-step explanation:




You should find that your system doesn't have solutions. This is also confirmed by the fact that the determinant of the matrix of the coefficient of the variables x, y and z is equal to zero.
Answer:
A = 62.35 cm²
Step-by-step explanation:
Use the area formula A =
, where a is the side length.
Plug in the values:
A = 
A = 
A = 62.35 cm²