He is 40 mins away form home because he is going 65 mi/hr = 1 min per mile
hopefully that helps you make an equation
Answer:
5x5 = 25
5x0,5 = 2.5
5x0,03 = 0.15
Adding them makes: 25+2.5+0.15 = 27.75
10minutes= 10/60 hours
= 1/6 hrs
speed = distance/ time
=3/ (1/6)
= 18 km/h
It's a value you should probably memorize:

You can derive it using some trigonometric identities, other known values of cosine, and properties of the cosine function. For example, using the double angle identity for cosine:

If
, then

and you probably know that
, so

When we take the square root, we should take the positive root because
whenever
:
