The temperature in the late afternoon
was -7.5°c. it dropped 5 degrees by early
evening and then dropped 8.5 degrees by midnight. write an equation to express the total change in temperature that day.

-7.5 - (8.5 + 5)

Step-by-step explanation:

We just add together the values of how much it dropped at different parts of the day, and subtract them from what we started with. The parenthesis are important cause we want to know what the total temperature drop for the day was before we subtract it to get the actual temperature we end up with.

T= - 5°C - 8.5°C = -13.5°C

Step-by-step explanation:

The initial temperature in the late afternoon was -7.5°C.

It dropped 5 degrees by early evening and then dropped 8.5 degrees by midnight.

Change in temperature (in evening) = -5°C

Change in temperature (in midnight) = -8.5°C

Here negative sign represents the decrease in the temperature.

Let T be the total change in the temperature.

So, total change in the temperature is

T = - 5°C - 8.5°C

T = 13.5°C

Therefore, the required equation is T = - 5°C - 8.5°C = 13.5°C.

exa:

)

3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.