wordpress.com · 2011-08-27 · created date: 6/22/2009 11:55:00 pm
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Class
Solving lnequalities With Variables on Both SidesWrite and solve an inequality for each situation.
1. Rosa has decided to sell pet rocks at an 2,art fair for $5 each. She has paid $50 torent a table at the fair and it costs her$2 to package each rock with a set ofinstructions. For what numbers of saleswill Rosa make a profit?
bx 7 50+2y
X: rta,J ry X_? l?3. Sophia types 75 words per minute and is
just starting to write a term paper. Pattonalready has 510 words written and typesat a speed of 60 words per minute. Forwhat numbers of minutes wil l Soohiahave more words typed than Patton?
. _ /-l5x
4.
Jamie has a job paying $25,000 andexpects to receive a $'1000 raise eachyear. Wei has a job paying $19,000a y€ar and expects a $1500 raise eachyear. For what span of time is Jamiemaking more money than Wei?
2F0oa+,ooox 7 |9,OOO + 1500y
V(lL rww'Keith is racing his little sister Paltieand has given her a 15 foot head start.She runs 5 ft/sec and he is chasing atI ft/sec. For how long can Pattie stayahead of Keith?
l5+5x lBx
Y z 7Ll w$/d'". 5zx : lL S>+ru^dS.
The table below shows the population of four cities in 2004 and the amount ofpopulation change lrom 2003. Use this table to answer questions 5*6.
5. lf the trends in this table continue, afterhow many years ywill the population o{Manchester, NH, be more than the populationof Vallejo, CA? Round your answer to thenearest tenth of a year.
A , y>0 .2 C y>34 .6
( B)y > 6.4 D y> 78.6
6. l f the trends in this table continue,for how long x wil l the populationof Carrollton, TX be less than thepopulation of Lakewood, CO?Round your answer to the nearesl
l1th of a year.
\U *<11 .7 H x<20 .1Gx<14 .6 J x<28 .3
41
City Population{2004}
PopulationChange
(from 2003)
Lakewood, CO 141 , 301 -nan
Valleio" CA 118 ,349 -1155
Carrollton, TX 117,823 - r t t / u
Manchester, NH 109 ,310 +261
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