Solve the system: -5x + 6y = -3 and 20x – 24y = 12 let y be "a" and write answer as an ordered pair with parenthesis

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?

Indicate the formula for the following conditions: p^c(n,r)=

Rationalize the denominator- 12x/√x-10