Symmetric property, I remembered the answer for this for my summer school. This is one of the equivalence properties of equality.
15 degrees lower than 7 degrees means that we have to subtract.
So we have 7 degrees and it wants 15 degrees lower, so we would do 7 - 15
And so 7-15 = -8
So 15 degrees lower than 7 degrees would be -8 degrees. :)
The train's rate 140 mph. 700 divided by 5 equals 140.
