What is 9x + 9 square

Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50. find the probability that a worker selected at random makes between $450 and $500

If abcde is reflected over the x-axis and then translated 3 units left, what are the new coordinates d? are he re

How do you write a paragraph proof to prove that the corresponding angles shown are congruent