The temperature at sunrise was -3*f. by noon, the temperature climbed 18 degrees. by sundown the temperature was -14*f. how much did the temperature drop between noon and sundown.

hint: integers

The temperature dropped 29 °F

Step-by-step explanation:

Temperature at sunrise =    -3 °F

      + Temperature rise = + 18    

   Temperature at noon =   15 °F

Temperature at sundown = -14 °F

   - Temperature at noon = - 15    

     Temperature change = -29 °F

The negative sign shows that the temperature dropped.

The temperature dropped by 29 °F.

The changes may be easier to see on a number line. If you start at -3 °F and increase the temperature  by 18 °F, you end up at 15 °F. If the temperature then changes to -14 °F, it has dropped by 29 °F.

check above link.

graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.