Let A = {a, b, c, d}. How many distinct reflexive relations on A are there? You must justify your answer.

Solve each quadratic equation by factoring and using the zero product property. x^2 + 18x = 9x

God's gym charges a sign-up fee of $100 plus $30 per month. write an expression to represent how much someone would pay for a membership.

Abag contains 10 white golf balls and 6 striped golf balls. a golfer wants to add 112 golf balls to the bag. he wants the ratio of white to striped gold balls to remain the same. how many of each should he add?