If 9 : x= x:4, then x=

How do you summarize data in a two-way frequency table?

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?

Ab and bc form a right angle at point b. if a= (-3,-1) and b= (4,4) what is the equation of bc?