9/20
explanation:
7/10 - 1/4
14/20 - 5/20
14-5/20
9/20
Answer:
.2121/1000
42
Step-by-step explanation:
Answer:
First Blank: 20 photos
Second Blank: 6 minutes
Third Blank: 45 Photos
Fourth Blank: 10 minutes.
Step-by-step explanation:
4*5=20 Photos
30/5=6 Minutes
9*5=45 Photos
50/5=10 Minutes
4n/4n-4 × n-1/n+1
= 4n(n-1)/(4n-4)(n+1)
= (4n^2 - 4n)/(4n^2 + 4n - 4n-4)
= (4n^2 - 4n)/(4n^2 - 4)
= 4(n^2 - n)/4(n^2 - 1)
=(n^2 - n)/(n^2 - 1)
