{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

IC1Answers - Name Econ 1078.004 – ANSWER KEY Spring 2008...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Name: Econ 1078.004 – ANSWER KEY Spring 2008 In-Class Assignment 1 (10 Points) February 6, 2008 Show Your Work! 1. Simplify the following by rationalizing the denominator: 3 5 ) 1 (-- x 22 3 5 3 5 3 3 5 3 5 25 3 5 3 5 ) 3 5 ( ) 3 5 ( ) 3 5 ( ) 1 (-- + =-- +-- + = + +-- x x x x x 2. Find the values of x that satisfy: ) 1 ( 3 2 5 4 ) 2 ( 15 8- < + +- x x x x The common denominator here is 15, so we have: x x x x x x x x x x x x x x x x <- <-- <-- < +--- < + +-- < + +- 4 5 20 10 10 30 5 10 10 12 30 15 8 )) 1 ( 2 ( 5 ) 4 ( 3 ) 2 ( 15 8 ) 1 ( 3 2 5 4 ) 2 ( 15 8 3. Solve the following inequalities: (a). ) 3 ( ) 1 ( ≤ +- x x This problem is already simplified, and we can see that the critical points are 1 and –3. So then we test numbers around these: Test (-4): 1 5 ≤- which is true Test: (0): 3 1 ≤ which is false Test: (2): 5 1 ≤- which is true So the answer is 3- < x or 1 ≥ x (b)....
View Full Document

{[ snackBarMessage ]}

Page1 / 4

IC1Answers - Name Econ 1078.004 – ANSWER KEY Spring 2008...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon bookmark
Ask a homework question - tutors are online