Answer:
720
Step-by-step explanation:
nPk = n!/(n-k)!
10P3 = 10!/(10-3)! = 10!/7!
= 10·9·8 = 720
5x = 20...where x = number of months
x = 20/5
x = 4...it would take Tom 4 months to save $20
Let the number of hours she work be n
So the equation will be
P = 9n
Since Y is the centroid then the larger piece of the median is 2 times that of the smaller piece
10 = 2*(2x - 3)
10 = 4x - 6
16 = 4x
x = 4