2. On Saturday morning the temperature outside was 4 degrees Fahrenheit. By noon, the temperature had risen 12 degrees, and then at 9 P. M., it dropped 17 degrees. Write an expression that this situation describes. What was the temperature at 9 P. M.? Explain how you could use the vertical number line as a tool to solve the problem.

it is 16 degrees outside then take away the 17 from the 16 and the answer is 1 degree

4096 bacteria

step-by-step explanation:

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.