The selling price of a house dropped from $250,000 to $210,000 over a period of 5 years. by what percent does the price need to increase in order to return to itsoriginal value of $250,000?

Adifferent website gives the cost for the first train as £56.88 and the second train as £20.11 with a £9.50 charge for cycle storage for the whole trip. how much would the journey cost you?

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?

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?