Lucy bought 6 notebooks for $15.30. What is the cost of a notebook, in dollars, if all the notebooks cost the same?

Assume that the weights of quarters are normally distributed with a mean of 5.67 g and a standard deviation 0.070 g. a vending machine will only accept coins weighing between 5.48 g and 5.82 g. what percentage of legal quarters will be rejected? round your answer to two decimal places.

Which number line represents the solution set for the inequality -1/2x> 24?

Solve 3x-18=2y and 5x-6y=14 by elimination or substitution . show all !