For a service visit, a technician charges a $38 fee plus an additional $12 for every 1/4 hour of work. If the technician's total charge was $158, for how much time, in hours, did the technician charge?

Which equation represents a line that is parallel to the line whose equation is 3x-2y=7( show all work)

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?

An ulcer medication has 300 milligrams in 2 tablets. how many milligrams are in 3 tablets?