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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
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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
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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
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