# Errata

## Errata for Head First Algebra

The errata list is a list of errors and their corrections that were found after the product was released. If the error was corrected in a later version or reprint the date of the correction will be displayed in the column titled "Date Corrected".

The following errata were submitted by our customers and approved as valid errors by the author or editor.

Color key: Serious technical mistake Minor technical mistake Language or formatting error Typo Question Note Update

Version Location Description Submitted By Date submitted Date corrected
Printed
Page 21
Big Bag o' Games graphic

On page 2 the games system is called KillerX, on page 21 it is called oPod.

Note from the Author or Editor:
change game system name in the graphic to KillerX from oPOD.

jr.larsen  Aug 08, 2009  Nov 21, 2014
Printed
Page 30
KillerX 2.0 graphic

This is really minor, but:
The OPOD name is in the item code for the game system. For consistency it should be KILLX-112.

Note from the Author or Editor:
The OPOD name is in the item code for the game system. For consistency it should be KILLX-112. Change it to KILLX - 112

jr.larsen  Aug 08, 2009  Nov 21, 2014
49
All annotations

Annotations are messed up completely, each character is replaced by a box.

Note from the Author or Editor:
Problem with production from PDF to safari. Printed version is correct.

Thomas Corbi�re  Jan 24, 2013  Sep 13, 2013
56
Exercise Solution - towards the bottom of the page

The text states "Isolate the variable by dividing both sides by 150" but it shows, correctly I might add, that both sides are divided by 230. So, the term actually reads 15/230 = P, not 15/150.

Note from the Author or Editor:
change the annotation at the bottom of the page to "Isolate the variable by dividing by 230"

Anonymous  Mar 29, 2010  Nov 21, 2014
67
All annotations

Annotations are messed up completely, each character is replaced by a box.

Note from the Author or Editor:
Issue with production in Safari, printed version is ok.

Thomas Corbi�re  Jan 24, 2013  Sep 13, 2013
Printed
Page 70
First problem - solution to 6 + 5x - 8y + 3y

The problem simplifies to: 2 + 3x -8y + 3y; the final answer is given as 3 + 3x -5y.
It should be : 2 + 3x -5y

Tracey Pilone

Jan 22, 2009  Nov 21, 2014
Printed
Page 70
Solution to the final problem starting with (9 times3)/x times xy

the final question simplifies to 25y-16 +.5 -x. The final answer should be 25y-15.5-x.

Tracey Pilone

Jan 22, 2009
75
All annotations

Annotations are blank.

Note from the Author or Editor:
Issue with production in Safari, printed version is ok.

Thomas Corbi�re  Jan 24, 2013  Sep 13, 2013
127
Top and bottom bubbles

Some letters are not displayed.

Note from the Author or Editor:
Issue with production in Safari, printed version is ok.

Thomas Corbi�re  Jan 25, 2013  Sep 13, 2013
Printed
Page 134
6. down

Question
Down 6.
Exponent ??
I go for Base * Base * Base :->

Note from the Author or Editor:
Answer to 139 needs to be changed to "base"

Dimitri  Sep 08, 2009  Nov 21, 2014
Printed
Page 152
Middle of graph.

While graphing the line corresponding to \$245, the rise is above the graph line for \$250 instead of beneath it.

Note from the Author or Editor:
Adjust the annotation for the line near \$250 to just below instead of just above.

Deborah Barnard  Jan 18, 2010  Nov 21, 2014
Printed
Page 187
Bottom right hand page

In the sidebar it states that "...the RISE of the slope is that number, and the RUN of that slope is 1" Rise and run are backwards.

Tracey Pilone

Feb 05, 2009  Nov 21, 2014
189
Edward�s Lawn Service

Some letters are not displayed.

Note from the Author or Editor:
Issue with production in Safari, printed version is ok.

Thomas Corbi�re  Jan 29, 2013  Sep 13, 2013
Printed
Page 192
Fill in table

The column "week #" of the fill in table is confusing and possibly misleading.
Ed has a cask for 10 weeks, so the second entry should read 4-13 (=10 weeks) instead of 4-14 (which would be 11 weeks).
And the subsequent entries have also to be changed: third entry 14-15 iso 15-16, fourth entry 16-21 iso 17-22

Note from the Author or Editor:
Confirmed. First column should be:
Week #
1 - 3
4 - 13
14 - 15
16 - 21

Peter Fink  May 23, 2011  Nov 21, 2014
Printed
Page 194
below the table

Ed starts with \$24 not \$12.

So these are wrong
"Cash = \$161 a week times weeks + \$12 he starts with"
"C=161t+12"
"y-intercept (0, 12)"

Same error on the following page.

Note from the Author or Editor:
p. 194
Top Equation should read cash = 16 a week times weeks (remove \$12... and the notes pointing to it)
Second equation should read C =161t (remove the +12)

Daniel Boos  Apr 21, 2011  Nov 21, 2014
Printed
Page 195
Graph

There is misleading black dot at the y-axis close to -800, which should be erased as it has nothing to do with this exercise.
Plus the answer should show the calculated result of this exercise, which is 990 \$ iso an approximate value from the graph.

Note from the Author or Editor:
Remove dot on the graph and notation that reads (0,12) .

Peter Fink  May 23, 2011  Nov 21, 2014
Printed
Page 199
second solution

y=y1=m(x-x1)

y-y1=m(x-x1)

Note from the Author or Editor:
the first line of the second solution should read:
y-y(sub 1) = m(x-x(sub 1)). Replace the first equals with a -

Daniel Boos  Apr 21, 2011  Nov 21, 2014
202

Most letters are not displayed.

Note from the Author or Editor:
Issue with production in Safari, printed version is ok.

Thomas Corbi�re  Feb 01, 2013  Sep 13, 2013
Printed
Page 230
Bottom graph

I think that the shading on the bottom inequality graph on this page is on the wrong side.

Note from the Author or Editor:
The shading on the bottom graph should be above the graph, not below.

Anonymous  May 03, 2010  Nov 21, 2014
Printed
Page 250
the Graph

c + 0.4p = 2.6
(0,2.6) (6.5,0)

Then (4,1) is better in focus

Grtzzz Dimitri

Note from the Author or Editor:
Perhaps shift c + 0.4p = 2.6 down slightly so the intersection is more perfectly over (4,1).

Dimitri  Sep 19, 2009
Printed
Page 269
Problem statement (repeated on the next page)

Also, on pages 269 and 270 the money collected is \$31,566 in the question, and \$31,568 in the answer. The problem statements should be corrected to reflect the \$31,568.

Tracey Pilone

Feb 05, 2009  Nov 21, 2014
Printed
Page 273
Mystery description

On p. 273 where it says "Kathleen said that she bought twice as many dresses as shoes and got 6 things all together" it will be changed to say something like "there are a total of 6 bags, with 2 bags per dress and 1 bag per pair of shoes." That means that we'll keep the 2d + s =6 and then we still have parallel lines.

Tracey Pilone

Feb 05, 2009
289
Equation on the right

Most of the text of the equation is blank.

Note from the Author or Editor:
Issue with production in Safari, printed version is ok.

Thomas Corbi�re  Feb 07, 2013  Sep 13, 2013
Printed
Page 296
Bottom left solution

Missing a after -2. Should read a2 - 2a - 24

Note from the Author or Editor:
Should read (a^2 - 2a -24) the last solution is missing an a after the -2

Anonymous  May 04, 2010  Nov 21, 2014
296
First equation

The variable y is not displayed.

Note from the Author or Editor:
Issue with production in Safari, printed version is ok.

Thomas Corbi�re  Feb 07, 2013  Sep 13, 2013
300

Some letters are not displayed.

Note from the Author or Editor:
Issue with production in Safari, printed version is ok.

Thomas Corbi�re  Feb 11, 2013  Sep 13, 2013
300
Annotations

The font for the annotations is not the right one making the text unreadable.

Note from the Author or Editor:
Issue with production in Safari, printed version is ok.

Thomas Corbi�re  Feb 11, 2013  Sep 13, 2013
Printed
Page 303
Bottom left problem

The binomial multiplication problem has a + sign between them (the same problem exists on the solutions page (304).

Note from the Author or Editor:
Remove the "+" sign between the two groups on the bottom left problem.

Pamela Coupar  May 04, 2010  Nov 21, 2014
307
2nd equation

The multiplication symbol is missing from the equation.

Note from the Author or Editor:
Issue with production in Safari, printed version is ok.

Thomas Corbi�re  Feb 11, 2013  Sep 13, 2013
Printed
Page 312
Bottom right example

A minus sign has been lost in the working, with the error propagated to the following lines.

8x + 24x -16x = 2400 becomes 8x(1 + 3 + 2) = 2400

It should be 8x(1 + 3 - 2) = 2400.

Note from the Author or Editor:
change 8x(1 + 3 + 2) = 2400 to 8x(1 + 3 - 2) = 2400
change 8x(6) to 8x(2)
change 48x/48 to 16x/16
change 2400/48 to 2400/16
change x = 50 to x = 150

jr.larsen  Aug 08, 2009  Nov 21, 2014
Printed
Page 312
bottom - left

suspicious variable transformation
Grtzzz . . . Dimitri

Note from the Author or Editor:
need to change the equation to have p as the variable, not z. the first line should read p/3 - 5/3 = 5

Dimitri  Sep 21, 2009  Nov 21, 2014
371
Last equation

Even though the equation as no solution, the answer "Up" should be circled.

Note from the Author or Editor:
Circle "up" on the last equation.

Thomas Corbi�re  Feb 17, 2013  Nov 21, 2014
Printed
Page 380
3rd paragraph

values missing a u.

Note from the Author or Editor:
add the "u" back into values in the 3rd paragraph

Anonymous  May 10, 2010  Nov 21, 2014
380
Bottom-right aside

Remove "the" in "How can we turn the these facts".

Note from the Author or Editor:
Remove the word "the" from the sidebar. Should read: "How can we turn these facts into limits for our equation?"

Thomas Corbi�re  Feb 18, 2013  Nov 21, 2014
382
Text above the mid-page equation

The text looks like garbage.

Note from the Author or Editor:
Issue with production in Safari, printed version is ok.

Thomas Corbi�re  Feb 18, 2013  Sep 13, 2013
387
Text above the first paragraph

The text looks like garbage.

Note from the Author or Editor:
Issue with production in Safari, printed version is ok.

Thomas Corbi�re  Feb 18, 2013  Sep 13, 2013
Printed
Page 394
8th paragraph on left

"Function:..., you can graph me in the much the same way..." Too many the's should read "Function:..., you can graph me in much the same way..."

Note from the Author or Editor:
Delete the "the" before much.

Anonymous  May 12, 2010  Nov 21, 2014
401
Brain Barbel wording

Some letters are not displayed.

Note from the Author or Editor:
Issue with production in Safari, printed version is ok.

Thomas Corbi�re  Feb 19, 2013  Sep 13, 2013
Printed
Page 418
crossword puzzle

Deja Vu
Page 373 and 418
Wrong crossword
Look at page 420

Grtzzz . . Dimitri

Note from the Author or Editor:
Page 373 is fine.

The crossword on p. 418 and 420 are the same one, but the format is different. The answers were generated from a different grid than the question. They need to match! The .cwz files should have been uploaded, but Tracey can change them if needed.

Dimitri  Sep 22, 2009  Nov 21, 2014
Printed
Page 426
third dotted line

-1(-d(m)) = (-7300+9(m)) closing parenthesis -1

Grtzz . . Dimitri

Note from the Author or Editor:
The line in question is missing the last parentheses. It should read

-1(-d(m)) = (-7300 + 9(m))-1

Dimitri  Sep 22, 2009  Nov 21, 2014
PDF,
Page 432
Option #3 annotation

"The principle plus \$4400 in interest" should be changed to "The principle plus \$4800 in interest".

Note from the Author or Editor:
Change the annotation to be the following "Max will end up owing a total of 28,800... the principle plus \$4800 in interest."

Thomas Corbi�re  Feb 20, 2013  Nov 21, 2014
441
Last paragraph

Most letters are not displayed.

Note from the Author or Editor:
Issue with production in Safari, printed version is ok.

Thomas Corbi�re  Feb 20, 2013  Sep 13, 2013
PDF,
Page 456
1st paragraph

Remove "the" in "If the you hear".

Note from the Author or Editor:
First sentence, first paragraph should read "If you hear the weatherman..."

Thomas Corbi�re  Feb 21, 2013  Nov 21, 2014
PDF,
Page 467
1st question

Remove "you're" in "so you�re the distance you give".

Note from the Author or Editor:
The third sentence in the first answer on the page should read "It doesn't matter which way, so the distance you give will always be positive."

Thomas Corbi�re  Feb 21, 2013  Nov 21, 2014
PDF
Page 468
Lower right

Rational numbers are repeatedly defined as ones that can be expressed as a fraction. Pi/2 is a fraction but it isn't rational. The definition should be: rational numbers are the set of numbers that can be expressed as the ration of integers.

Note from the Author or Editor:
Under rational numbers, the second sentence should read "Any number that can be written as a fraction of two integers is a rational number."

algebraTutor  Sep 26, 2011  Nov 21, 2014
Printed
Page 472
'Try this' example

The example is set up to use 12.34 + 5.6, but the 'Right way' and 'Wrong way' both show 12.34 + 4.5

Note from the Author or Editor:
change 12.34 + 5.6 to 12.34 + 4.5

jr.larsen  Aug 08, 2009  Nov 21, 2014
PDF,
Page 482
2nd bullet

"You do that my simply" should be replaced by "You do that by simply".

Note from the Author or Editor:
The second sentence of the second bullet should read "You do that by simply moving the decimal..."

Thomas Corbi�re  Feb 21, 2013  Nov 21, 2014
Printed
Page 492

Answer should be 3 16/28 not 3 22/28 for 2 6/7 x 1 1/4

100 divided by 28 is 3 with remainder 16 not 22.

Note from the Author or Editor:
Change the 22 in the solution to 16 for the 2 6/7 x 1 1/4 problem.

Alexander Mackenzie  Feb 17, 2009  Nov 21, 2014
Printed
Page 508
last problem

The answer for 27/4 is given as 8 3/4 but should be 6 3/4.

Note from the Author or Editor:
The answer for 27/4 is given as 8 3/4 but should be 6 3/4.

Esther  Jul 03, 2009  Nov 21, 2014
PDF
Page 518
first solution

The answer for 5^5 is given as

Note from the Author or Editor:
The answer for 5^5 is given as "3215" but should be "3125".

Stefan Zapf  Aug 04, 2009  Nov 21, 2014