Respuesta :
Answer:
You burn 265 calories running and then 7 calories per minute swimming.
Your friend burns 273 calories running and then 11 calories per minute swimming.
Let us assume that both of you swim for x minutes.
Calories burnt by you = [tex]265+7x[/tex]
Calories burnt by your friend = [tex]273+11x[/tex]
Difference between both = [tex]273+11x-(265+7x)[/tex]
= [tex]273+11x-265-7x[/tex]
= [tex]8+4x[/tex]
Hence, difference can be shown using [tex]8+4x[/tex].
