Remember:Watch for signs when
adding and subtracting positive and
negative numbers.To solve Part A, use the temperature
at 6 A.M. and the amount of change to find
the temperature at noon.Use your answer from Part Ato solve Part B.To solve Part C, think about the direction
of the temperature change.Test-Taking Tips
- Reread the item.
- Use the Test-Prep strategy.
- Apply appropriate rules,
definitions, properties, or
strategies. - Analyze your answers.
206 Chapter 7 pages 229–230 for exercise sets.Read the test item for a general idea of the problem.- Reread the test item. Use context clues to help
determine the meaning of any unfamiliar words. - Determine the steps needed to answer the problem.
1.Find the new temperature.
2.Determine changes in temperature.
Solve the problem.- Apply appropriate rules, definitions, properties,
and strategies.
Item 1 is partially worked out for you.Solve. Show or describe your steps.
Part B
If there is a sales tax of 6% on the fencing,
what is the total cost for the fence?
Show all your work.1.At 6 A.M., the temperature at the Ski Resort was 6
F. By noon, the
temperature had risen 25 F. At 10 P.M., the temperature was 14
F.
Part A
What was the temperature at noon?
Show all your work.
Part B
What was the temperature change
from noon to 10 P.M.?
Show all your work.Check your work. Review your notes.
Make sure you have completed all parts of the items.
- Analyze your answers. Do they make sense?
Check by working backward.
2.Greg is putting a fence around a square
garden with a side length of 9 feet.
The fence costs $15.50 per foot.
Part A
What is the cost, before tax, of the fencing
Greg needs for the square garden?
Show all your work.
Part C
What was the temperature change
from 6 A.M. to 10 P.M.?
Show all your work.