Use elimination to solve the system of equations
2x+y=7
6x + 5y = 27

Given that de, df, and ef are midsegments of △abc, and de=3.2 feet, ef=4 feet, and df=2.4 feet, the perimeter of △abc is .

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?

Let f(x) = 5/x and g(x)=2x2+5x. what two numbers are not in the domain of f o g