the answer is 2 because you can't divided 2 by anything else other then itself
420!
840 x (3/7) = 360
840-360 = 480
480 x (1/8) = 60
480 - 60 = 420
Answer: Because you need more of a smaller unit to equal a larger unit.
Example:
If you want to convert 5km to meters, there must be more meters than kilometers.

Answer:
G'(1, 3)
Step-by-step explanation:
Counterclockwise rotation 90°: (x, y) ⇒ (-y, x)
So the point G is transformed to ...
... G(3, -1) ⇒ G'(1, 3)
Answer:
D) 504
Step-by-step explanation:
Having 9 members for elect president, vice-president and secretary
Then C₉,₃ = 9! / ( 9 - 3 )! = 9*8*7 = 504