Solve the variable. balance the equation 47=f+31

Restrictions on f(x) = 1/x+5 and g(x) = x-2

(a) (8%) compute the probability of an even integer among the 100 integers 1! , 2! , 3! , until 100! (here n! is n factorial or n*(n-1)*(n-2) *… 1) (b) (16%) compute the probability of an even integer among the 100 integers: 1, 1+2, 1+2+3, 1+2+3+4, …., 1+2+3+… + 99, and 1+2+3+… + 100

Polygon abcde is reflected to produce polygon a′b′c′d′e′. what is the equation for the line of reflection?