1/14/14 2.3 Homework (Quadratic Equations) Online Homework System Name: ____________________________ Class #: ____________________________ Instructor:Maple T.A. Administrator Assignment Worksheet 1/14/14 - 10:05 AM Class: Post University - College Algebra (MAT120.37, MOD 3) (1qaq3b2) Section #: ____________________________ Assignment:2.3 Homework (Quadratic Equations) Question 1: (1 point) Solve by factoring. 2 x = 3x+18 If there are multiple solutions, separate the answers with semicolons (;). x = __________ Question 2: (1 point) Solve by factoring. 2 6 x +13x = 5 If there are multiple solutions, separate the answers with semicolons (;). x = __________ Question 3: (1 point) Find the discriminant and identify the best description of the equation's root(s). 2 x +5 = √7x−2 (a)1 real and 1 complex root courses.thinkwell.com/courses/791/exercises/319230/take 1/3 1/14/14 2.3 Homework (Quadratic Equations) 2 complex solutions (b) (c) 1 complex solution 1 real solution (d) 2 real solutions (e) Question 4: (1 point) At a tennis club, a 15,000 ft2 rectangular area is partitioned into three rectangular courts of equal size. A total of 800 feet of fencing is used to enclose the three courts, including the interior sides. What are the possible dimensions, in feet, of the entire rectangular area? Select all that apply. 25 (a) feet by feet 100 feet by 150 100 feet by 50 100 feet by 300 300 feet by 50 (b) (c) 600 (d) feet feet feet feet courses.thinkwell.com/courses/791/exercises/319230/take 2/3 1/14/14 2.3 Homework (Quadratic Equations) (e) Question 5: (1 point) A ladder of length 2x+1 feet is positioned against a wall such that the bottom is x−1 feet away from a wall. The distance between the floor and the top of the ladder is 2x feet. Find the length, in feet, of the ladder. The length of the ladder is ____________feet. Assume that a right angle is formed by the wall and the floor. Question 6: (1 point) A small rock sits on the edge of a tall building. A strong wind blows the rock off the edge. The distance, in feet, between the rock and the ground t seconds after the rock leaves the edge is given by How many seconds after the rock leaves the edge is it 460 d = 2 −16 t − 4t + 472. feet from the ground? If the answer is not an integer, enter it as a decimal. Round to the nearest hundredth, if needed. ____________ seconds How many seconds after the rock leaves the edge does it hit the ground? If the answer is not an integer, enter it as a decimal. Round to the nearest hundredth, if needed. ____________ seconds courses.thinkwell.com/courses/791/exercises/319230/take 3/3