47) Solve the equations: +=-

Math 012 60 Practice Problems for the Final Exam 948) Solve the equations: a) 2430xx+-b) ()2316x-c) 2261yy-d) 23270xx--49) Simplify the following: a) 4612849x yzb) 3341627343-c) 15612d) 36250) ====+-+51) If()321fxxx=-+, find each of the following values: a) ( )2f

Math 012 60 Practice Problems for the Final Exam 10b) ()2fc) 12f 52) In 1995 there were 35 computers in a certain elementary school. In 2000 there were 52 computers in the same school and by 2005 there were 157 computers in the school. In 2008, there were 125 computers in the school. a) What was the percent increase in number of computers in the school from 1995 to 2000? b) What was the percent increase in number of computers in the school from 1995 to 2005? c) What was the percent decrease in number of computers in the school from 2005 to 2008? 53) Monica can mow the lawn in 4 hours using a riding mower. Her daughter can mow the same lawn in 12 hours using a push mower. How long would it take them to mow the lawn if they are working together? 54) The perimeter of a rectangle is 360 feet. The length of the rectangle is 60 feet less than twice the width of the rectangle. What are the dimensions of the rectangle? 55) According to the World Health Organization, in 2002 the annual cigarette consumption per person in Japan was 3023. If the population in Japan in 2002 was 127,096,000, how many cigarettes were consumed in Japan in 2002? Write your answer using scientific notation rounded to three decimal places. -56) Simplify the expression: () ()()40323243258xx yx y.

Math 012 60 Practice Problems for the Final Exam 1158) Draw a graph of the following: 21yx=-+. 60) For what values of x is the following expression undefined? 32