A in the answer for this question
Thank you
Step-by-step explanation:
The circumference of the clock will be 8.6π because its hand is the radius. In 15 minutes the hand moves a quarter of the circumference which is 2.15π or 6.571.
A matrix is diagonal if

In other words, you want non-zero elements only when the indices of the row and the column are the same: the first element of the first row must be non zero, the second element of the second row must be non-zero, and so on. All other elements must be zero.
Answer:
5 = 60. 6 = 72. 8 = 96
Step-by-step explanation:
60 = 12 x 5
72 = 12 x 6
84 = 12 x 7
96 = 12 x 8
A
6x-14+18=10
6x+4=10
6x=6
X=1