PRINCIPLES OF MATHEMATICS 11

Section Assignment 2.1 Answer Key

Principles of Mathematics 11 Section Assignment 2.1 91

Version 04 Module 2

General Instructions for Assignments

These instructions apply to all the Assignments, but will not be reprinted eachtime. Remember them for future sections.

(1) Treat this assignment as a test, so do not refer to your Module or notes orother materials. A scientific calculator is permitted.

(2) Where questions require computations or have several steps, show your work.

(3) Always read the question carefully to ensure you answer what is asked. Oftenunnecessary work is done because a question has not been read correctly.

92 Section Assignment 2.1 Principles of Mathematics 11

Module 2

PRINCIPLES OF MATHEMATICS 11

Section Assignment 2.2

Answer Key

Module 2

Principles of Mathematics 11 Section Assignment 2.2 161

8. Find the values of k so that the equation 2x2 + 6x + k = 0 hastwo different real roots.

9. The sum of a number and 15 times its reciprocal is equal to8. Find the numbers.

2

2

115 8

15 8

8 15 0( 5)( 3) 0

5 or 3

xx

x x

x xx x

x

+ ⋅ =

+ =

− + =− − =

=

Let number

reciprocal

x

x

=

=1

2 4 036 8 0

3689

or 4.52

b ack

k

k k

− >− >

<

< <

Principles of Mathematics 11 Section Assignment 2.2, Answer Key 169

Version 04 Module 2

(3)

(3)