Two neighbors are draining swimming pools. Mr. Zoetrope’s pool has 10,858 gallons and is draining 150 gallons per minute. Mrs. Horner’s pool has 9,650 gallons and is draining 110
gallons per minute. Write and solve an equation to determine the number of minutes ( ) m the
two pools must drain to have the same amount of water.
a. Analyze the given information. Write the general structure of the equation.
b. Formulate a plan. Write the two variable expressions and define the given variable. Then,
write the equation.
Variable definition:
Left-side expression:
Right-side expression:
Write the equation:
c. Determine a solution. Solve the equation.
Write the solution in a complete sentence with appropriate units.

d. Justify the solution. Check the solution using substitution.
e. Evaluate the reasonableness of the solution and the problem-solving process.
Is the solution reasonable?
Why or why not?
Is the process effective?
Why or why not?