What is the distance between -6 and -3 in the number line

Which ahows the graph of the solution set of 6x+4y< 12

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?

Which of the following vectors are orthogonal to (2,1)? check all that apply