Question

In city A, the temperature rises 9° F from 8am then the temperature drops 8°F from 9am to 10am in city B the temperature drops 1°F from 8am to 9am then the temperature drops 3°F from 9am to 10am write an expression that represents the change In temperature from 8am to 10am for each city. Simplify and interpret each sum. Which expression represents the change in temperature for city A?

Answer 1

For City A, the expression for temperature change is 9 + (-8)

The amount the temperature changes for City A = 1°F

For City B, the expression for temperature change is -1 + (-3) = -4°F

The amount the temperature changes for City B = -4°F

Explanation:

The given information are;

In City A, the temperature rise from 8 am to 9 am = 9°F

In City A, the temperature drop from 9 am to 10 am = 8°F

In City B, the temperature drop from 8 am to 9 am = 1°F

In City B, the temperature drop from 9 am to 10 am = 3°F

The expression for that represents the temperature change from 8 am to 10 am is therefore;

For City A

Temperature change from 8 am to 10 am are

8 am to 9 am = +9°F

9 am to 10 am = -8°F

Sum, change from 8 am to 10 am = 9 + (-8) = 1°F

For City B

Temperature change from 8 am to 10 am are

8 am to 9 am = -1°F

9 am to 10 am = -3°F

Sum, change from 8 am to 10 am = -1 + (-3) = -4°F