1. A rectangular swimming pool measures 8 m by 10 m. The pool is to be surrounded by a deck of uniform width. The total area of the pool and the deck is to be the same as twice the area of the pool. Assuming x is the width of the deck, write a quadratic equation that could solve this problem. DO NOT SOLVE the equation or SIMPLIFY it.
2. Write the system of equations for the following scenario: ? Two integers have a difference of ?30. When the larger integer is increased by 3 and added to the square of the smaller integer, the result is 189.

4 A speed boat travelled 108 km downstream and 78 km upstream in 7 hours. If the river current is 10 km/h, fill in the table (here and on answer sheet). distance speed time equation downstream (with current) upstream (against current)