3) Find the change from $100 when buying: a) 3 boxes of chocolates at $11 each
b) x boxes of chocolates at $11 each
c) x boxes of chocolates at $ y each

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 equation of a line that passes through points (0, 4) and (-4,-8)?

3/4 = c/36 i need with this fraction proble.