Jerry makes $300 per month but always runs out of money. He has $85 in fixed expenses and $60 in variable expenses that must be paid each month. How much money does he spend each month on discretionary expenses?

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent variable?

Gravel is being dumped from a conveyor belt at a rate of 25 ft3/min, and its coarseness is such that it forms a pile in the shape of a cone whose base diameter and height are always equal. how fast is the height of the pile increasing when the pile is 14 ft high? (round your answer to two decimal places.) ft/min

Whats are the trickiest steps to do when adding or subtracting rational expressions? how does knowledge of rational numbers u in adding and subtracting rational expressions?