18 - (-f) = 91
Subtracting a negative value changes to addition:
18 + f = 91
Subtract 18 from both sides:
F = 73
Answer:
c
Step-by-step explanation:
Answer:

Step-by-step explanation
using the rules of exponents, it would be
÷
so then take away 27 from 10 and get -17 meaning that the answer would be A or 
Answer:
F/m=a
Step-by-step explanation:
The answer is: "123454321"
Hope this helps!