Answer:

Step-by-step explanation:
Given


Required
Determine the distance between the two points
Distance (D) is calculated as:

Substitute values for x's and y's





Express as 9 * 2

Split:



If all 25 questions are different,
When order of selection counts:
P(25,7)
=25!/(25-7)!
=15511210043330985984000000/6402373705728000
=2422728000
When order of selection does not count count:
C(25,7)
=25!/(7!*(25-7)!)
=15511210043330985984000000/(6402373705728000*5040)
=480700
It would be 25 how I got that answer was I did 200 ÷ 8 and that gave me 25
Answer:
.25 4(.25) = 1
Step-by-step explanation:
C would equal -3 because you are going up 9 units