You want to buy an item that cost $100. which of these is the most cost-effective choice for buying the item

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?

The measure of an angle is 117°. what is the measure of a supplementary angle?

What is the value of x in the equation7x+2y=48 when y=3