4. in knoxville, the temperature rises 4° from 4 p. m. to 5 p. m. then the
temperature drops 7º from 5 p. m. to 6 p. m. in cleveland, the temperature
drops 6º from 4 p. m. to 5 p. m. then the temperature drops 2
from 5 p. m. to 6 p. m.
a. what expression represents the change in temperature for knoxville?
b. what integer represents the change in temperature for knoxville?
c. what expression represents the change in temperature for cleveland?
d. what integer represents the change in temperature for cleveland?

a. 4 + (-7)

b. (-3)

c. (-6) + (-2)

d. - 8

Step-by-step 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