She lived there 8 years
1/9 of 18 is 2.
So 4/9 of 18 = 4*2 = 8
So Sara lived in Rochester for 8 years.
4(5)+4(3)+3(2)=$38 total cost =$38
Answer:
50.5
Step-by-step explanation:
45+56 then divide by 2 to find the middle of the 2 numbers
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
X=75
y=75
z=105
as you do 42 + 63=105
