Answer:
126
Step-by-step explanation:
n! / (r! (n-r)!)
In this case n = 9 and r = 4
9!/ (4! * (9-4)!)
9!/ (4! * 5!)
= 126
9! = 9x8x7x6x5x4x3x2x1
Swap x and y
51x+32
combine like terms
3x+48x=51x
since 32 is alone it just stays alone
hope this helps
f(4) =0 because 4>0
f(-2) =-2 coz -2 lies between 0 and -3
f(-5) =2/-5
44 square cm
