Answer:
![7^(\circ)F](https://img.qammunity.org/2020/formulas/mathematics/middle-school/i1m31ba9p6qcq61zri49oz4hsjmhc8j7cc.png)
Explanation:
We are given that one morning the temperature was
![5^(\circ)F](https://img.qammunity.org/2020/formulas/mathematics/middle-school/3anzccafk07u4hslwsl2oxz05p6ob7cw90.png)
By noon it had increased by 12 degrees.
We have to find the temperature at noon and explain.
Temperature at morning=-5 degrees Fahrenheit
Temperature increased by =12 degrees
Therefore, the temperature at noon=12+(-5)=7 degrees Fahrenheit
Because temperature is increased by 12 degree therefore, 12 added to -5 degrees Fahrenheit to find the value of temperature at noon.
Sign of larger number is positive therefore, the sign of sum will be positive.
Hence, the temperature at noon=
![7^(\circ)F](https://img.qammunity.org/2020/formulas/mathematics/middle-school/i1m31ba9p6qcq61zri49oz4hsjmhc8j7cc.png)