Answer:
a. 4 + (-7)
b. (-3)
c. (-6) + (-2)
d. - 8
Explanation:
- Lets explain how to solve the problem
- There are some words we can change them to mathematics symbols
as drop means (-) rise means (+)
- In Knoxville, the temperature rises 4° from 4 P.M. to 5 P.M.
∴ The temperature add by 4
- Then the temperature drops 7º from 5 P.M. to 6 P.M.
∴ The temperature add by - 7
- The temperature in Knoxville add by 4 and added by -7
a.
∴ The expression represents the change in temperature for
Knoxville is ⇒ 4 + (-7)
b.
∵ 4 + (-7) = 4 - 7 = -3
∴ The integer represents the change in temperature for Knoxville
is -3
- In Cleveland, the temperature drops 6º from 4 P.M. to 5 P.M.
∴ The temperature add by -6
- Then the temperature drops 2 from 5 P.M. to 6 P.M.
∴ The temperature add by -2
- The temperature in Cleveland added by - 6 and by -2
c.
∴ The expression represents the change in temperature for
Cleveland is ⇒ (-6) + (-2)
d.
∵ (-6) + (-2) = -6 - 2 = -8
∴ The integer represents the change in temperature for Cleveland
is -8