Madeline borrowed some money from her friend in order to help buy a new video game system. Madeline agreed to pay back her friend $5 per week, and after 13 weeks, Madeline still owed her friend $5. Write an equation for L, L, in terms of t, t, representing the amount Madeline owes her friend after t weeks.

At a sand and gravel plant, sand is falling off a conveyor and onto a conical pile at a rate of 16 cubic feet per minute. the diameter of the base of the cone is approximately three times the altitude. at what rate is the height of the pile changing when the pile is 12 feet high? (hint: the formula for the volume of a cone is v = 1 3 πr2h.)

At the newest animated movie, for every 9 children, there are 4 adults. there are a total of 39 children and adults at the movie.

Write the pair of fractions as a pair of fractions with a common denominator