SOLUTION: Get Ready for Chapter 5
Evaluate each expression for the given values.
1. 3x + y if x = −4 and y = 2
6. 4x = −16
SOLUTION: SOLUTION: 7. 2. −2m + 3k if m = −8 and k = 3
SOLUTION: 3. CARS The expression
SOLUTION: represents the gas mileage of a car. Find the gas mileage of a car that
goes 295 miles on 12 gallons of gasoline. Round to
the nearest tenth.
8. 2x + 1 = 9
SOLUTION: SOLUTION: So, the car gets 24.6 mi/gal.
Solve each equation.
4. x − 4 = 9
9. 4x − 5 = 15
SOLUTION: SOLUTION: 5. x + 8 = −3
SOLUTION: 10. 9x + 2 = 3x − 10
SOLUTION: 6. 4x = −16
SOLUTION: eSolutions Manual - Powered by Cognero
7. 11. 3(x − 2) = −2(x + 13)
SOLUTION: Page 1
Case2:
Get Ready for Chapter 5
11. 3(x − 2) = −2(x + 13)
SOLUTION: So, the solution is {-29, 7}.
14. |3x − 2| = 16
SOLUTION: Case1:
Case2:
12. FINANCIAL LITERACY Claudia opened a
savings account with $325. She saves $100 per
month. Write an equation to determine how much
money d she has after m months.
SOLUTION: The rate of 100 is a constant rate or the slope of the
equation. The number is $325 is a constant number.
So, d = 100m + 325.
Solve each equation.
13. |x + 11| = 18
SOLUTION: Case1:
Case2:
So, the solution is
.
15. SURVEYS In a survey, 32% of the people chose
pizza as their favorite food. The results were
reported to within 2% accuracy. What is the
maximum and minimum percent of people who chose
pizza?
SOLUTION: Let p represent the percent of people who chose
pizza.
Case1: So, the solution is {-29, 7}.
14. |3x − 2| = 16
Case2:
SOLUTION: Case1:
So, the maximum percent is 34% and the minimum
percent is 30%.
Case2:
eSolutions Manual - Powered by Cognero
Page 2