P and Q are the subsets of a universal set U. If U = {x:x is a whole number, x<9}, P= {y:y is a multipe of 2} and Q= {z:z is a factor of 12}, verify that P n Q (complement) = P U Q (complement).

60 2(x + 2) in the diagram, gef and hef are congruent. what is the value of x?

One number is 4 less than 3 times a second number. if 3 more than two times the first number is decreased by 2 times the second number, the result is 11. use the substitution method. what is the first number?

What is the area of the shaded sector?