Section 2.3 Solving Linear Equations TRUE/FALSE 1. Linear equations are always difficult to solve. ANS: F
PTS: 1
DIF:
easy
2. To say that an equation is linear means that it is a straight line. ANS: F
PTS: 1
DIF:
easy
3. Logarithms are sometimes needed to solve linear equations. ANS: F
PTS: 1
DIF:
easy
4. Techniques for solving linear equations can sometimes be used to reverse the roles of variables in equations. ANS: T
PTS: 1
DIF:
easy
MULTIPLE CHOICE 1. An iPad costs $491 at your local computer store. The cable company charges $24 per month for a DSL Internet connection. Write a formula that gives the cost , in dollars, of buying an iPad and paying for months of Internet service. a. c. b. d. ANS: A 2. The life expectancy
PTS: 1
DIF:
, in years, for a child born
easy years after 2000 is given by .
In what birth year would a child have a life expectancy of 77.34 years? a. 2005 b. 2004 ANS: B
c. 2002 d. That life expectancy never occurs. PTS: 1
DIF:
easy
3. A rental car charges $72.87 for insurance and other fees plus a flat rate of $24.95 per day. Write a formula that gives the cost , in dollars, of renting a car for days. a. c. b. d. ANS: A
PTS: 1
DIF:
easy
4. One rental company charges $52.71 in fees for a television plus $22.77 per week. A second rental company charges $31.75 in fees plus $25.61 per week. How many weeks would make the total cost of renting a television the same for both companies? You can be charged for part of a week, so you should report your answer correct to two decimal places.
