Answer:
triangle
Step-by-step explanation:
it has 3 sides, not four
Answer:
It is necessary four parameters.
Step-by-step explanation:
Since the augmented matrix of the consistent system has rank equal to three then the number of free variables is (number of unknows)-rank then there are 7-3=4 free variables. This means that are necessary four parameter to specify all solutions.
120 is the right answer that is what my teacher told me