A function is said to even if it returns the same output when given two opposite inputs:
In your case, you have
And since 
, the proof is concluded.
Answer: x=4
Step-by-step explanation: write down 11x-2+9x+1=19x+3, then combine the like terms... 20x-1=19x+3, then subtract 19x from both sides which will give you x-1=3, and 4-1=3 so x=4
Answer:
Find the place value you want (the "rounding digit") and look at the digit just to the right of it.
If that digit is less than 5, do not change the rounding digit but drop all digits to the right of it.
If that digit is greater than or equal to five, add one to the rounding digit and drop all digits to the right of it.
Step-by-step explanation:
70 is a composite number because it can be divided by numbers other than one and itself.
