If each number is rounded to the nearest whole number, which statement is true?

a = 6.9 + 8.3

b = 6.2 + 8.5

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?

What is the value of x in the following equation? -3x-2=2x+8

Susie wants to take her friend out for lunch. she wants to spend $9.75 each person. how much will she spend in all.