Answer:
1,680
Step-by-step explanation:
There are 8 students to choose for the first chair. After we choose one, we have 7 students to choose from for the second chair, 6 for the third chair, etc.
8 * 7 * 6 * 5 = 1680 (ans)
Answer:
a= 
Step-by-step explanation:
to find a isolate it on one side by taking 1/3 by subtraction to the other side
a=
-
= 