A certain species of fish costs $3.99 each. You can spend at most $45. How many of this type of fish can you buy for your aquarium?

Aline on the wall and a line on the floor are skew. always, sometimes, or never?

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?

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10