100-99=1+98=99-97=2+96=98-95=3
2-1=1
Find
using Pythagorean Theorem,
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.
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Hope this helps.
-12+5
for -12.34,we take it as -12
for -4.8,we take it as -5
to measure the difference,here's what you need to do
-12-(-5)
=-12+5
thus the ans is -12+5
hope it helps
Hints: how far behind her will you be when you start (miles, not just hours). What equation then describes your position and your friend's position.