While brendan is vacationing with his family at the cabin, they take a motorboat on the river. the motorboat travels
18 miles per hour in still water.
1. let w represent the speed of the river current in miles per hour. write an expression for how fast the
motorboat is able to go downstream (with the current) write another expression for how fast the motorboat is
able to go upstream (against the current).
2. the motorboat travels 49 miles upstream in the same time it takes to travel 77 miles downstream. what is the
speed of the current w? use the elimination method to solve.

Which of the following expressions are equivalent ?

An airplane consumes fuel at a constant rate while flying through clear skies, and it consumes fuel at a rate of 64 gallons per minute while flying through rain clouds. let c represent the number of minutes the plane can fly through clear skies and r represent the number of minutes the plane can fly through rain clouds without consuming all of its fuel. 56c+64r < 900056c+64r< 9000 according to the inequality, at what rate does the airplane consume fuel while flying through clear skies, and how much fuel does it have before takeoff? the airplane consumes fuel at a rate of gallons per minute while flying through clear skies, and it has gallons of fuel before takeoff. does the airplane have enough fuel to fly for 60 minutes through clear skies and 90 minutes through rain clouds?

Carley bought a jacket that was discounted 10% off the original price. the expression below represents the discounted price in dollars, based on x, the original price of the jacket.