In a reunion 80 people have Canadian passports, 95 have US passports and 15 do not have any passport. If here are 140 people in the reunion, how many of them
have dual passports (US and Canadian?) Solve the problem by first formulating an
equation
Please enter the numerical value of your answer with two decimal digits. Do not
enter any other symbols.

step-by-step explanation:

step-by-step explanation:

to determine whether a given function is even, we simply substitute x with -x in the expression. if the result after simplification is identical to the original equation, then the function is said to be even other wise odd.

f(-x) = (-x)^2 - (-x) + 8

      = x^2 + x +8

the resulting function is not identical to the original one;

f(-x) ≠ f(x)

therefore, f(x) is not an even function