Garrett is creating a table to model the speed of a canoe in a river. He knows that the canoe travels at 4 mph in still water. What does x represent in Garrett’s table? Canoe Speed
Direction on river
Speed
With current
(downstream)
4 + x
Against current
(upstream)
4 – x
speed of current in river
speed of canoe upstream
time of trip
distance traveled

At dinner, 2/5 of the people had fish and 1/3 had chicken. if everyone else had lamb, what fraction of the people had lamb? and if 40 people had lamb , calculate the total number of people at the dinner.

Driving 75 mph, it takes alicia 2 hours to reach the airport to go on a vacation. it then takes her 4 hours to get to her destination with the jet traveling at a speed of 400 mph. how many miles does alicia travel to get to her destination?

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.