Fifteen times the square of a non-zero number is equal to 20 times number. what is the number? its not 4/3

True or false? many triangular shapes can be circumscribed about a given circle

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

What is the slope of the line (-7,2) (4,6)