Question 1: It takes Mike twice as long to tile the kitchen floor as Lee.When they work together they can finish tiling the floor in 12 hours.Which of the following equations could be used to determine how many hours it would take Lee to tile the kitchen floor by himself?

Options:

1/2 + 1/12 = 1/x

1/x + 1/2x = 1/12

1/x + 1/2 = 12

x + 2x = 12

Question 2: On a test Eddie solved the equation 5/x-3 - 30/x^2-9 = 1and found that x = 2 and x = 3. His steps were correct, so why was this answer marked wrong?

Options:

He is correct. The teacher made a mistake grading his test.

x = 2 is a correct solution to the equation, but x = 3 is an extraneous solution.

x = 3 is a correct solution to the equation, but x = 2 is an extraneous solution.

Both x = 2 and x = 3 are extraneous solutions.