Answer:
13
Step-by-step explanation:
because a is the missing number. Well, 21 minus or - 8 is equal to 13.
First one is c and the second im not sure on
The awnser is (-1+3/x-3/x2+1/x3 )
Maybe the second from the left, I'm not sure
Answer:
17
Step-by-step explanation:
Vertically opposite angles are equal
so
7x - 9 = 110
7x = 119
x = 17
