Rational equations

Clear denominators, solve, and reject extraneous solutions.

Standards:A-REI.A.2

Try it: three questions

Real questions from the practice bank. Tap an answer to check it.

Question 1 of 3

A water tank can be filled by Pipe A in 6 hours, or by Pipe B in 9 hours. If both pipes are open, how many hours will it take to fill the tank?

Question 2 of 3

A boat travels upstream 12 km in the same time it travels downstream 18 km. If the boat's speed in still water is 15 km/h, find the speed of the current.

Question 3 of 3

A delivery driver can complete a route in 6 hours working alone. With a helper, they can complete the same route in 4 hours. How long would it take the helper to complete the route alone?

How this fits in

Rational equations is one skill in the Advanced Algebra unit. Students read the unit lesson, then earn a bronze, silver, or gold medal on their last 10 answers. Medals never go down. A mastered unit comes back for review after 1, 3, 7, 16, and 35 days so it stays learned.

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