At Store C, Sam's total purchase came to $16.50 before the discount. After the discount, he paid with a $20-bill and received $4.82 in changé. Part A What was the mystery discount rate?

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?

X+y=-4 x-y=2 use elimination with adding and subtraction

Atruck can be rented from company a $50 a day plus $0.60 per mile. company b charges $20 a day plus $0.80 per mile to rent the same truck. find the number of miles in a day at which the rental costs for company a and company b are the same