Answer:
Step-by-step explanation: For example, if we have matrix A whose all elements in the first column are zero. Then, by one of the property of determinants, we can say that its determinant is equal to zero. Hence, A would be called as singular matrix. Note that singular matrices are non-invertible (their inverse does not exist).
Answer:
16 bottles
Step-by-step explanation:
you can buy 16 bottles
(20*30)/2 = 300
300 km is the area of the triangle
