OVERDUE ASSIGNMENT!! click the picture!(bottom number is 56cm)

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 for x and y: 217x + 131y = 913; 131x + 217y = 827

Divide. –4.2 ÷ 6 = a –0.7 b 0.7 c –7 d 7 me