Question

1. in knoxville, the temperature rises 4° from 4 p.m. to 5 p.m. then the temperature drops 7° from 5 p.m. to 6 p.m. in cleveland, the temperature drops 6° 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?

Explanation:

Step1: Define rise and drop

A rise in temperature is a positive change and a drop is a negative change.

Step2: Find Knoxville expression

For Knoxville, it rises 4° ( + 4) then drops 7° (-7). The expression is $4+( - 7)$.

Step3: Calculate Knoxville integer

$4+( - 7)=4 - 7=-3$.

Step4: Find Cleveland expression

For Cleveland, it drops 6° (-6) then drops 2° (-2). The expression is $-6+( - 2)$.

Step5: Calculate Cleveland integer

$-6+( - 2)=-6 - 2=-8$.

Answer:

a. $4+( - 7)$
b. -3
c. $-6+( - 2)$
d. -8