Instruction: Answer with full solution and explanation 1. A gardener wants to make a rectangular enclosure using a wall as one side and 120m of fencing for the other three sides. Express the area in terms of x, and find the value of x that gives the greatest area. 2. The chairman of a barangay wants to enclose a rectangular lot of area 800m2

using two types of material. Parallel sides are to have the same fencing materials that cost 500 and 400 per meter, respectively. How many meters of fencing material should be used to minimize the cost?