(look at the image) can i get help on these?

13.m∡7= 180-72=108°

14. m∡8=180-110=70

15.m∡8=180-142=38

16 m∡6=180-107=73

17 m∡6=80 vertically opposite angles

Step-by-step explanation:

(n^3 - n)

= n(n-1)(n+1)

since it is divisible by 3 and 2 ,because it is a multiple 3 consecutive number

if, n-1 is odd then n+1 is also odd, then it is a multiple of 9

but if, n-1 is even then n+1 is also even, then it is a multiple of 4

so, largest multiple = max(9*2, 4*3) = max(18, 12) = 18

w'x is 0.

hope it