F(x) = -2 + 8
f(x) = 6
No matter what x is, it does not change the value of f(x).
f(-1,8) = 6
Answer: 6
Explanation is in the file
tinyurl.com/wpazsebu
Answering from phone so this will be a bit messy.
a
b=a+1
c=b+1=a+2
2a=b+20
Therefore:
2a=a+1+20
a=21,b=22,c=23
Pythagorean Theorem, where a^2+b^2=c^2. Just plugging in the numbers:
200^2 + 125^2=C^2
40,000 + 15,625=C^2
55,625=C^2
Then just take the square root
C=235.8495
If the number needs to be rounded then 236 meters.
A + -5 = -12
A - 5 = -12
A = -7.
This is the solution.