Your middle school has 900 students 1/3 of students bring their lunch instead of buying lunch at school what is the value of ratios of the number of students who bring there lunch to the number of students who do not?

Choose the correct slope of the line that passes through the points (1, -3) and (3, -5)

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?

Find two numbers if their sum is 91 and the ratio is 6: 7?